Half a MM make any difference?

R Brickston said:

I'd like to swap a 52-42-30 105 crank out for either a Sugino XD600/XD300
46-36-26 square taper or the Nashbar Trekker 48-38-28 ISIS.

The bike, a Trek 520, came factory with a 68/118.5mm BB. Hardly anything is
available in a square taper and nothing that I can find in an ISIS, but
plenty of 118mm available. Will my chainline change much by the BB being off
.5 of a milimeter?

If you were using the same crank and just using different BB's, no.

However, since you're changing cranks, you'll need to use the
appropriate BB. Some "low-profile" cranks require 110mm BB's. It
appears the Sugino cranks use 118mm BB's
(http://www.sheldonbrown.com/harris/cranks.html#11074), so they should
bolt right on.

Jeff

"R Brickston" <[email hidden]> wrote in
news:EHvcg.3817$oA6.1493@trnddc06:

Quoted message said:

I'd like to swap a 52-42-30 105 crank out for either a Sugino
XD600/XD300 46-36-26 square taper or the Nashbar Trekker 48-38-28
ISIS.

The bike, a Trek 520, came factory with a 68/118.5mm BB. Hardly
anything is available in a square taper and nothing that I can find in
an ISIS, but plenty of 118mm available. Will my chainline change much
by the BB being off .5 of a milimeter?

It'll change more by using a 118. The XD cranks call for a 113, and I've
heard of people successfully using a 107 with it.. The spindle length is
determined by the crank, not the frame.

On the bright side, there are lots and lots and lots of reasonably good,
cheap 113 square taper BBs out there.

And definitely get the Sugino. Best crank deal in the universe.

"JeffWills" <[email hidden]> wrote in
news:[email hidden]:

Quoted message said:

R Brickston said:

I'd like to swap a 52-42-30 105 crank out for either a Sugino
XD600/XD300 46-36-26 square taper or the Nashbar Trekker 48-38-28
ISIS.

The bike, a Trek 520, came factory with a 68/118.5mm BB. Hardly
anything is available in a square taper and nothing that I can find
in an ISIS, but plenty of 118mm available. Will my chainline change
much by the BB being off .5 of a milimeter?

If you were using the same crank and just using different BB's, no.

However, since you're changing cranks, you'll need to use the
appropriate BB. Some "low-profile" cranks require 110mm BB's. It
appears the Sugino cranks use 118mm BB's
(http://www.sheldonbrown.com/harris/cranks.html#11074), so they should
bolt right on.

Jeff

118 is only if you have a 73mm shell. 68mm should use a 113.

"Hank Wirtz" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"JeffWills" <[email hidden]> wrote in
news:[email hidden]:

Quoted message said:

R Brickston said:

I'd like to swap a 52-42-30 105 crank out for either a Sugino
XD600/XD300 46-36-26 square taper or the Nashbar Trekker 48-38-28
ISIS.

The bike, a Trek 520, came factory with a 68/118.5mm BB. Hardly
anything is available in a square taper and nothing that I can find
in an ISIS, but plenty of 118mm available. Will my chainline change
much by the BB being off .5 of a milimeter?

If you were using the same crank and just using different BB's, no.

However, since you're changing cranks, you'll need to use the
appropriate BB. Some "low-profile" cranks require 110mm BB's. It
appears the Sugino cranks use 118mm BB's
(http://www.sheldonbrown.com/harris/cranks.html#11074), so they should
bolt right on.

Jeff

118 is only if you have a 73mm shell. 68mm should use a 113.

The 105 crank has a 68 x 188.5 Octalink V1, so with XD I'll try the 68 x
113.

R Brickston said:

I'd like to swap a 52-42-30 105 crank out for either a Sugino XD600/XD300
46-36-26 square taper or the Nashbar Trekker 48-38-28 ISIS.

The bike, a Trek 520, came factory with a 68/118.5mm BB. Hardly anything is
available in a square taper and nothing that I can find in an ISIS, but
plenty of 118mm available. Will my chainline change much by the BB being off
.5 of a milimeter?

Why don't you just put a 24, 26, or 28 tooth 74mm bcd inner chainring
on the bike? $10-$15 and 5 minutes and you are done. That is what I
did back in 1992 when I bought a Trek 520. Worked very well for many,
many years. Eventually went to a 20 tooth inner ring. You have bar
end shifters on the Trek 520 so there is no problems like STI has with
small inner chainrings.

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

R Brickston said:

I'd like to swap a 52-42-30 105 crank out for either a Sugino XD600/XD300
46-36-26 square taper or the Nashbar Trekker 48-38-28 ISIS.

The bike, a Trek 520, came factory with a 68/118.5mm BB. Hardly anything
is
available in a square taper and nothing that I can find in an ISIS, but
plenty of 118mm available. Will my chainline change much by the BB being
off
.5 of a milimeter?

Why don't you just put a 24, 26, or 28 tooth 74mm bcd inner chainring
on the bike? $10-$15 and 5 minutes and you are done. That is what I
did back in 1992 when I bought a Trek 520. Worked very well for many,
many years. Eventually went to a 20 tooth inner ring. You have bar
end shifters on the Trek 520 so there is no problems like STI has with
small inner chainrings.

I think you probably had a 110/74 BCD, this is a 105 5503 triple with a
130/94 and I understand a 30 tooth is as small as you can go. In any event,
that still leaves me with a 52 on top, almost unusable.

R Brickston said:

Will my chainline change much by the BB being off
.5 of a milimeter?

I doubt that you could measure the difference repeatably. But then,
there's a good chance that two nominally same-size BBs from different
sources would produce more of a variance than .5mm anyway.

Slap it in, check your sprocket and crank arm clearances at the stays,
and ride.
--
Typoes are a feature, not a bug.
Some gardening required to reply via email.
Words processed in a facility that contains nuts.

R Brickston said:

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

R Brickston said:

I'd like to swap a 52-42-30 105 crank out for either a Sugino XD600/XD300
46-36-26 square taper or the Nashbar Trekker 48-38-28 ISIS.

The bike, a Trek 520, came factory with a 68/118.5mm BB. Hardly anything
is
available in a square taper and nothing that I can find in an ISIS, but
plenty of 118mm available. Will my chainline change much by the BB being
off
.5 of a milimeter?

Why don't you just put a 24, 26, or 28 tooth 74mm bcd inner chainring
on the bike? $10-$15 and 5 minutes and you are done. That is what I
did back in 1992 when I bought a Trek 520. Worked very well for many,
many years. Eventually went to a 20 tooth inner ring. You have bar
end shifters on the Trek 520 so there is no problems like STI has with
small inner chainrings.

I think you probably had a 110/74 BCD, this is a 105 5503 triple with a
130/94 and I understand a 30 tooth is as small as you can go.

You need to get yourself to a competent bike shop soon before you blow
all your money. Your Shimano 105 crankset has a 130mm bcd for the two
outer chainrings and 74mm bcd for the inner chainring. You can put as
low as a 24 tooth inner chainring on a 74mm bcd crank. You can go as
low as a 38 tooth chainring for either of the two outer rings. Only
the Shimano Dura Ace triple crankset has a goofy inner chainring size
of 92mm bcd or something. It only goes down to 30 tooth. Only Dura
Ace has this, not Ultegra or 105 or anything else on earth.

Yes my crank was a 110/74. It takes the exact same size inner
chainrings as a 130/74 crankset. The Sugino mentioned by the internet
bicyclists also is a 110/74. It takes the exact same size inner
chainring as your current Shimano 105.

Spend $10 and get a 24 or 26 74mm bcd inner chainring, put it on the
bike and be done with it. Don't blow your money on a crankset that you
don't need.

In any event,

Quoted message said:

that still leaves me with a 52 on top, almost unusable.

If the 52 is unusable, then don't use it with the smallest cogs. You
do know a 52x13 is an easier gear than a 46x11? The 46 is the top ring
on the Sugino cranks mentioned on this forum. 13 is your third cog on
your 11-32 cassette.

Internet bicyclists love to waste money.

Quoted message said:

R Brickston said:

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

R Brickston wrote:
> I'd like to swap a 52-42-30 105 crank out for either a Sugino XD600/XD300
> 46-36-26 square taper or the Nashbar Trekker 48-38-28 ISIS.
>
> The bike, a Trek 520, came factory with a 68/118.5mm BB. Hardly anything
> is
> available in a square taper and nothing that I can find in an ISIS, but
> plenty of 118mm available. Will my chainline change much by the BB being
> off
> .5 of a milimeter?

Why don't you just put a 24, 26, or 28 tooth 74mm bcd inner chainring
on the bike? $10-$15 and 5 minutes and you are done. That is what I
did back in 1992 when I bought a Trek 520. Worked very well for many,
many years. Eventually went to a 20 tooth inner ring. You have bar
end shifters on the Trek 520 so there is no problems like STI has with
small inner chainrings.

I think you probably had a 110/74 BCD, this is a 105 5503 triple with a
130/94 and I understand a 30 tooth is as small as you can go.

You need to get yourself to a competent bike shop soon before you blow
all your money. Your Shimano 105 crankset has a 130mm bcd for the two
outer chainrings and 74mm bcd for the inner chainring. You can put as
low as a 24 tooth inner chainring on a 74mm bcd crank. You can go as
low as a 38 tooth chainring for either of the two outer rings. Only
the Shimano Dura Ace triple crankset has a goofy inner chainring size
of 92mm bcd or something. It only goes down to 30 tooth. Only Dura
Ace has this, not Ultegra or 105 or anything else on earth.

Yes my crank was a 110/74. It takes the exact same size inner
chainrings as a 130/74 crankset. The Sugino mentioned by the internet
bicyclists also is a 110/74. It takes the exact same size inner
chainring as your current Shimano 105.

Spend $10 and get a 24 or 26 74mm bcd inner chainring, put it on the
bike and be done with it. Don't blow your money on a crankset that you
don't need.

Some more good advice. But a $13 26 tooth cog from Nashbar. 74mm bcd.
Put it on your Shimano 105 crankset. So you have 52-42-26. Also buy
from Nashbar a Shimano 105 9 speed cassette. $30 for a 13-23. It will
have loose cogs held together by three bolts. Take the bolts out. You
don't need them. Take off your current 11-32 9 speed cassette on your
Trek 520. Combine the 13-23 cassette and the 11-32 cassette and get a
new cassette going from 13 to 32. You will have more usable and lower
high gears with your 52-42-26 than if you waste money on the Sugino
46-36-26 crank and keep your current 11-32 cassette. Its the
combination of the big ring and the small cog and the wheel diameter
that determines your gear. 46x11 is higher than 52x13. Nashbar has a
10% off coupon code going now. So for less than $40, not including
shipping, you will have lower lows and lower highs and better spaced
cogs on your 9 speed Trek 520. Far superior to wasting money on a
Sugino crankset.

Quoted message said:

In any event,

Quoted message said:

that still leaves me with a 52 on top, almost unusable.

If the 52 is unusable, then don't use it with the smallest cogs. You
do know a 52x13 is an easier gear than a 46x11? The 46 is the top ring
on the Sugino cranks mentioned on this forum. 13 is your third cog on
your 11-32 cassette.

Internet bicyclists love to waste money.

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

R Brickston said:

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

R Brickston wrote:
> I'd like to swap a 52-42-30 105 crank out for either a Sugino
> XD600/XD300
> 46-36-26 square taper or the Nashbar Trekker 48-38-28 ISIS.
>
> The bike, a Trek 520, came factory with a 68/118.5mm BB. Hardly
> anything
> is
> available in a square taper and nothing that I can find in an ISIS,
> but
> plenty of 118mm available. Will my chainline change much by the BB
> being
> off
> .5 of a milimeter?

Why don't you just put a 24, 26, or 28 tooth 74mm bcd inner chainring
on the bike? $10-$15 and 5 minutes and you are done. That is what I
did back in 1992 when I bought a Trek 520. Worked very well for many,
many years. Eventually went to a 20 tooth inner ring. You have bar
end shifters on the Trek 520 so there is no problems like STI has with
small inner chainrings.

I think you probably had a 110/74 BCD, this is a 105 5503 triple with a
130/94 and I understand a 30 tooth is as small as you can go.

You need to get yourself to a competent bike shop soon before you blow
all your money. Your Shimano 105 crankset has a 130mm bcd for the two
outer chainrings and 74mm bcd for the inner chainring. You can put as
low as a 24 tooth inner chainring on a 74mm bcd crank. You can go as
low as a 38 tooth chainring for either of the two outer rings. Only
the Shimano Dura Ace triple crankset has a goofy inner chainring size
of 92mm bcd or something. It only goes down to 30 tooth. Only Dura
Ace has this, not Ultegra or 105 or anything else on earth.

Oops! Absolutely right. It is a 74mm inner and will take the smaller ring.
Thanks.

Quoted message said:

Yes my crank was a 110/74. It takes the exact same size inner
chainrings as a 130/74 crankset. The Sugino mentioned by the internet
bicyclists also is a 110/74. It takes the exact same size inner
chainring as your current Shimano 105.

Spend $10 and get a 24 or 26 74mm bcd inner chainring, put it on the
bike and be done with it. Don't blow your money on a crankset that you
don't need.

In any event,

Quoted message said:

that still leaves me with a 52 on top, almost unusable.

If the 52 is unusable, then don't use it with the smallest cogs. You
do know a 52x13 is an easier gear than a 46x11? The 46 is the top ring
on the Sugino cranks mentioned on this forum. 13 is your third cog on
your 11-32 cassette.

I got an 11-34 on the back, so without consulting a gear chart, I think the
52 will at least throw out the 11 for top end use.

Quoted message said:

Internet bicyclists love to waste money.

I'm only wasting it on paper, so far.

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Quoted message said:

R Brickston said:

<[email hidden]> wrote in message
news:[email hidden]...
>R Brickston wrote:
>> I'd like to swap a 52-42-30 105 crank out for either a Sugino
>> XD600/XD300
>> 46-36-26 square taper or the Nashbar Trekker 48-38-28 ISIS.
>>
>> The bike, a Trek 520, came factory with a 68/118.5mm BB. Hardly
>> anything
>> is
>> available in a square taper and nothing that I can find in an ISIS,
>> but
>> plenty of 118mm available. Will my chainline change much by the BB
>> being
>> off
>> .5 of a milimeter?
>
> Why don't you just put a 24, 26, or 28 tooth 74mm bcd inner chainring
> on the bike? $10-$15 and 5 minutes and you are done. That is what I
> did back in 1992 when I bought a Trek 520. Worked very well for
> many,
> many years. Eventually went to a 20 tooth inner ring. You have bar
> end shifters on the Trek 520 so there is no problems like STI has
> with
> small inner chainrings.

I think you probably had a 110/74 BCD, this is a 105 5503 triple with a
130/94 and I understand a 30 tooth is as small as you can go.

You need to get yourself to a competent bike shop soon before you blow
all your money. Your Shimano 105 crankset has a 130mm bcd for the two
outer chainrings and 74mm bcd for the inner chainring. You can put as
low as a 24 tooth inner chainring on a 74mm bcd crank. You can go as
low as a 38 tooth chainring for either of the two outer rings. Only
the Shimano Dura Ace triple crankset has a goofy inner chainring size
of 92mm bcd or something. It only goes down to 30 tooth. Only Dura
Ace has this, not Ultegra or 105 or anything else on earth.

Yes my crank was a 110/74. It takes the exact same size inner
chainrings as a 130/74 crankset. The Sugino mentioned by the internet
bicyclists also is a 110/74. It takes the exact same size inner
chainring as your current Shimano 105.

Spend $10 and get a 24 or 26 74mm bcd inner chainring, put it on the
bike and be done with it. Don't blow your money on a crankset that you
don't need.

Some more good advice. But a $13 26 tooth cog from Nashbar. 74mm bcd.
Put it on your Shimano 105 crankset. So you have 52-42-26. Also buy
from Nashbar a Shimano 105 9 speed cassette. $30 for a 13-23. It will
have loose cogs held together by three bolts. Take the bolts out. You
don't need them. Take off your current 11-32 9 speed cassette on your
Trek 520. Combine the 13-23 cassette and the 11-32 cassette and get a
new cassette going from 13 to 32. You will have more usable and lower
high gears with your 52-42-26 than if you waste money on the Sugino
46-36-26 crank and keep your current 11-32 cassette. Its the
combination of the big ring and the small cog and the wheel diameter
that determines your gear. 46x11 is higher than 52x13. Nashbar has a
10% off coupon code going now. So for less than $40, not including
shipping, you will have lower lows and lower highs and better spaced
cogs on your 9 speed Trek 520. Far superior to wasting money on a
Sugino crankset.

Quoted message said:

In any event,

Quoted message said:

that still leaves me with a 52 on top, almost unusable.

If the 52 is unusable, then don't use it with the smallest cogs. You
do know a 52x13 is an easier gear than a 46x11? The 46 is the top ring
on the Sugino cranks mentioned on this forum. 13 is your third cog on
your 11-32 cassette.

Quoted message said:

Quoted message said:

Internet bicyclists love to waste money.

As stated, got an 11-34 already and a 46-48 will be more useful than a 52.
Further, the original thread "Pins and Ramps," explained how I was trying to
keep the crankset "pinned and ramped" because I've got STI shifters on this
520.

Hank Wirtz wrote:
---snip---

Quoted message said:

The spindle length is
determined by the crank, not the frame.

---/snip---

Yes and no. A given manufacturer's recommended BB width may not work
with some frames. For example, an old crank (sugino?) that I had which
called for a 113 spindle shifted great on my steel frame, but wouldn't
shift down to the small ring worth a toot with the same BB when I
swapped it over to my wife's aluminum frame - seat tube was, relatively
speaking, too fat. Once I picked up some cheapy 115 BB, it worked like
a charm (again).

SYJ

R Brickston said:

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

R Brickston said:

<[email hidden]> wrote in message
news:[email hidden]...
>R Brickston wrote:
>> I'd like to swap a 52-42-30 105 crank out for either a Sugino
>> XD600/XD300
>> 46-36-26 square taper or the Nashbar Trekker 48-38-28 ISIS.
>>
>> The bike, a Trek 520, came factory with a 68/118.5mm BB. Hardly
>> anything
>> is
>> available in a square taper and nothing that I can find in an ISIS,
>> but
>> plenty of 118mm available. Will my chainline change much by the BB
>> being
>> off
>> .5 of a milimeter?
>
> Why don't you just put a 24, 26, or 28 tooth 74mm bcd inner chainring
> on the bike? $10-$15 and 5 minutes and you are done. That is what I
> did back in 1992 when I bought a Trek 520. Worked very well for many,
> many years. Eventually went to a 20 tooth inner ring. You have bar
> end shifters on the Trek 520 so there is no problems like STI has with
> small inner chainrings.

I think you probably had a 110/74 BCD, this is a 105 5503 triple with a
130/94 and I understand a 30 tooth is as small as you can go.

You need to get yourself to a competent bike shop soon before you blow
all your money. Your Shimano 105 crankset has a 130mm bcd for the two
outer chainrings and 74mm bcd for the inner chainring. You can put as
low as a 24 tooth inner chainring on a 74mm bcd crank. You can go as
low as a 38 tooth chainring for either of the two outer rings. Only
the Shimano Dura Ace triple crankset has a goofy inner chainring size
of 92mm bcd or something. It only goes down to 30 tooth. Only Dura
Ace has this, not Ultegra or 105 or anything else on earth.

Oops! Absolutely right. It is a 74mm inner and will take the smaller ring.
Thanks.

Quoted message said:

Yes my crank was a 110/74. It takes the exact same size inner
chainrings as a 130/74 crankset. The Sugino mentioned by the internet
bicyclists also is a 110/74. It takes the exact same size inner
chainring as your current Shimano 105.

Spend $10 and get a 24 or 26 74mm bcd inner chainring, put it on the
bike and be done with it. Don't blow your money on a crankset that you
don't need.

In any event,

Quoted message said:

that still leaves me with a 52 on top, almost unusable.

If the 52 is unusable, then don't use it with the smallest cogs. You
do know a 52x13 is an easier gear than a 46x11? The 46 is the top ring
on the Sugino cranks mentioned on this forum. 13 is your third cog on
your 11-32 cassette.

I got an 11-34 on the back, so without consulting a gear chart, I think the
52 will at least throw out the 11 for top end use.

Yes 52x11 is useless. But you can just not use the 52x11. Use your
52x13 as your highest gear. An excellent high gear. Instead of a 27
speed bike, you have a 26 speed bike. And a 42 tooth chainring which
is an excellent size chainring.

And to get back to a 27 speed bike, you can very simply buy a Shimano 9
speed cassette beginning with a 13 cog, such as a 13-23 Shimano 105
cogset for $30 from Nashbar. Use the 13-14 from the 13-23 cassette to
substitute for the 11-13 on your current 11-34 cassette and you have a
very useful touring cogset of 13-14-15-17-20-23-26-30-34. 52-42
chainrings will work very well with this cassette.

And the cost will be much cheaper and the work much easier than buying
a new Sugino crankset and square taper bottom bracket. $13 for 26
inner chainring from Nashbar and $30 for Shimano 105 9 speed cogset
from Nashbar. You can find the inner chainring much cheaper from
Cambria Bike Outfitters. And when the cassette wears out, the 13-14
can be used on the next 11-34 cassette you buy since the small cogs are
not used very often and last much longer than the middle cogs. So the
$30 and $13 costs are pretty much one time expenses for the life of the
bike.

Quoted message said:

Quoted message said:

Internet bicyclists love to waste money.

I'm only wasting it on paper, so far.

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

R Brickston said:

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

R Brickston wrote:
> <[email hidden]> wrote in message
> news:[email hidden]...
> >R Brickston wrote:
> >> I'd like to swap a 52-42-30 105 crank out for either a Sugino
> >> XD600/XD300
> >> 46-36-26 square taper or the Nashbar Trekker 48-38-28 ISIS.
> >>
> >> The bike, a Trek 520, came factory with a 68/118.5mm BB. Hardly
> >> anything
> >> is
> >> available in a square taper and nothing that I can find in an ISIS,
> >> but
> >> plenty of 118mm available. Will my chainline change much by the BB
> >> being
> >> off
> >> .5 of a milimeter?
> >
> > Why don't you just put a 24, 26, or 28 tooth 74mm bcd inner
> > chainring
> > on the bike? $10-$15 and 5 minutes and you are done. That is what
> > I
> > did back in 1992 when I bought a Trek 520. Worked very well for
> > many,
> > many years. Eventually went to a 20 tooth inner ring. You have bar
> > end shifters on the Trek 520 so there is no problems like STI has
> > with
> > small inner chainrings.
>
> I think you probably had a 110/74 BCD, this is a 105 5503 triple with
> a
> 130/94 and I understand a 30 tooth is as small as you can go.

You need to get yourself to a competent bike shop soon before you blow
all your money. Your Shimano 105 crankset has a 130mm bcd for the two
outer chainrings and 74mm bcd for the inner chainring. You can put as
low as a 24 tooth inner chainring on a 74mm bcd crank. You can go as
low as a 38 tooth chainring for either of the two outer rings. Only
the Shimano Dura Ace triple crankset has a goofy inner chainring size
of 92mm bcd or something. It only goes down to 30 tooth. Only Dura
Ace has this, not Ultegra or 105 or anything else on earth.

Oops! Absolutely right. It is a 74mm inner and will take the smaller
ring.
Thanks.

Quoted message said:

Yes my crank was a 110/74. It takes the exact same size inner
chainrings as a 130/74 crankset. The Sugino mentioned by the internet
bicyclists also is a 110/74. It takes the exact same size inner
chainring as your current Shimano 105.

Spend $10 and get a 24 or 26 74mm bcd inner chainring, put it on the
bike and be done with it. Don't blow your money on a crankset that you
don't need.

In any event,
> that still leaves me with a 52 on top, almost unusable.

If the 52 is unusable, then don't use it with the smallest cogs. You
do know a 52x13 is an easier gear than a 46x11? The 46 is the top ring
on the Sugino cranks mentioned on this forum. 13 is your third cog on
your 11-32 cassette.

I got an 11-34 on the back, so without consulting a gear chart, I think
the
52 will at least throw out the 11 for top end use.

Yes 52x11 is useless. But you can just not use the 52x11. Use your
52x13 as your highest gear. An excellent high gear. Instead of a 27
speed bike, you have a 26 speed bike. And a 42 tooth chainring which
is an excellent size chainring.

And to get back to a 27 speed bike, you can very simply buy a Shimano 9
speed cassette beginning with a 13 cog, such as a 13-23 Shimano 105
cogset for $30 from Nashbar. Use the 13-14 from the 13-23 cassette to
substitute for the 11-13 on your current 11-34 cassette and you have a
very useful touring cogset of 13-14-15-17-20-23-26-30-34. 52-42
chainrings will work very well with this cassette.

The current 11-34 cogs are mounted in an alloy spyder, so they are not full
size and can't be stacked.

Quoted message said:

And the cost will be much cheaper and the work much easier than buying
a new Sugino crankset and square taper bottom bracket. $13 for 26
inner chainring from Nashbar and $30 for Shimano 105 9 speed cogset
from Nashbar. You can find the inner chainring much cheaper from
Cambria Bike Outfitters. And when the cassette wears out, the 13-14
can be used on the next 11-34 cassette you buy since the small cogs are
not used very often and last much longer than the middle cogs. So the
$30 and $13 costs are pretty much one time expenses for the life of the
bike.

I could swap the rings out of the current crankset, maybe get some used
ones. However, I'd really rather have the exact gears *I* want... *with* the
pins and ramps.

It's not like I'm swapping out to a Dura Ace for $400. The hardly used 105
crankset and BB are worth something on Ebay; even if it's only $25 for the
pair, the delta on the replacement crank about $50-$60.

Its an '05, low mile, $1300 when new, bike that I paid $800 for, so an extra
net $50-$60 or so in additional costs is not going to break the bank.

Quoted message said:

Quoted message said:

Quoted message said:

Internet bicyclists love to waste money.

I'm only wasting it on paper, so far.

R Brickston said:

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

R Brickston said:

<[email hidden]> wrote in message
news:[email hidden]...
>R Brickston wrote:
>> <[email hidden]> wrote in message
>> news:[email hidden]...
>> >R Brickston wrote:
>> >> I'd like to swap a 52-42-30 105 crank out for either a Sugino
>> >> XD600/XD300
>> >> 46-36-26 square taper or the Nashbar Trekker 48-38-28 ISIS.
>> >>
>> >> The bike, a Trek 520, came factory with a 68/118.5mm BB. Hardly
>> >> anything
>> >> is
>> >> available in a square taper and nothing that I can find in an ISIS,
>> >> but
>> >> plenty of 118mm available. Will my chainline change much by the BB
>> >> being
>> >> off
>> >> .5 of a milimeter?
>> >
>> > Why don't you just put a 24, 26, or 28 tooth 74mm bcd inner
>> > chainring
>> > on the bike? $10-$15 and 5 minutes and you are done. That is what
>> > I
>> > did back in 1992 when I bought a Trek 520. Worked very well for
>> > many,
>> > many years. Eventually went to a 20 tooth inner ring. You have bar
>> > end shifters on the Trek 520 so there is no problems like STI has
>> > with
>> > small inner chainrings.
>>
>> I think you probably had a 110/74 BCD, this is a 105 5503 triple with
>> a
>> 130/94 and I understand a 30 tooth is as small as you can go.
>
> You need to get yourself to a competent bike shop soon before you blow
> all your money. Your Shimano 105 crankset has a 130mm bcd for the two
> outer chainrings and 74mm bcd for the inner chainring. You can put as
> low as a 24 tooth inner chainring on a 74mm bcd crank. You can go as
> low as a 38 tooth chainring for either of the two outer rings. Only
> the Shimano Dura Ace triple crankset has a goofy inner chainring size
> of 92mm bcd or something. It only goes down to 30 tooth. Only Dura
> Ace has this, not Ultegra or 105 or anything else on earth.

Oops! Absolutely right. It is a 74mm inner and will take the smaller
ring.
Thanks.

> Yes my crank was a 110/74. It takes the exact same size inner
> chainrings as a 130/74 crankset. The Sugino mentioned by the internet
> bicyclists also is a 110/74. It takes the exact same size inner
> chainring as your current Shimano 105.
>
> Spend $10 and get a 24 or 26 74mm bcd inner chainring, put it on the
> bike and be done with it. Don't blow your money on a crankset that you
> don't need.
>
> In any event,
>> that still leaves me with a 52 on top, almost unusable.
>
> If the 52 is unusable, then don't use it with the smallest cogs. You
> do know a 52x13 is an easier gear than a 46x11? The 46 is the top ring
> on the Sugino cranks mentioned on this forum. 13 is your third cog on
> your 11-32 cassette.

I got an 11-34 on the back, so without consulting a gear chart, I think
the
52 will at least throw out the 11 for top end use.

Yes 52x11 is useless. But you can just not use the 52x11. Use your
52x13 as your highest gear. An excellent high gear. Instead of a 27
speed bike, you have a 26 speed bike. And a 42 tooth chainring which
is an excellent size chainring.

And to get back to a 27 speed bike, you can very simply buy a Shimano 9
speed cassette beginning with a 13 cog, such as a 13-23 Shimano 105
cogset for $30 from Nashbar. Use the 13-14 from the 13-23 cassette to
substitute for the 11-13 on your current 11-34 cassette and you have a
very useful touring cogset of 13-14-15-17-20-23-26-30-34. 52-42
chainrings will work very well with this cassette.

The current 11-34 cogs are mounted in an alloy spyder, so they are not full
size and can't be stacked.

Quoted message said:

And the cost will be much cheaper and the work much easier than buying
a new Sugino crankset and square taper bottom bracket. $13 for 26
inner chainring from Nashbar and $30 for Shimano 105 9 speed cogset
from Nashbar. You can find the inner chainring much cheaper from
Cambria Bike Outfitters. And when the cassette wears out, the 13-14
can be used on the next 11-34 cassette you buy since the small cogs are
not used very often and last much longer than the middle cogs. So the
$30 and $13 costs are pretty much one time expenses for the life of the
bike.

I could swap the rings out of the current crankset, maybe get some used
ones. However, I'd really rather have the exact gears *I* want... *with* the
pins and ramps.

But that is just it, you do get the exact gears you want, actually more
usable gears, by changing the cassette to a 13-34, by mixing up a 13-23
9 speed cassette and 11-34 cassette. You can find both cassettes on
sale for about $50-60 total. And a smaller 26 tooth inner chainring
for $5-10. Cambria Bike Outfitters has the 26 tooth inner chainring
for $5. Probably OK deals on the lower priced Shimano 9 speed
cassettes with all loose cogs and spacers. And of course you keep the
Shimano 105 crank with pins and ramps on the middle and outer rings.
And the rings work well with STI and the Shimano front derailleur. Do
a search on this forum and you will find many references to Shimano
front derailleurs being very specific to the middle ring size. Front
derailleurs designed for 42 tooth middle rings shift like [censored] with STI
when people put a 39 tooth middle ring on. And you want to put on a 38
or 36 middle ring with the Nashbar or Sugino cranks. And of course you
have to buy a new bottom bracket. Of unknown length while the Shimano
105 crank and bottom bracket are already correct.

A 46-36-26 crank with a 11-34 cassette has pretty much the same gearing
as a 52-42-26 with a 13-34 cassette. You can get to the same gearing
by switching the front crankset or by switching the rear cassette.
Cheaper and easier and more foolproof to change the cassette. And the
inner chainring of course.

Quoted message said:

It's not like I'm swapping out to a Dura Ace for $400. The hardly used 105
crankset and BB are worth something on Ebay; even if it's only $25 for the
pair, the delta on the replacement crank about $50-$60.

Its an '05, low mile, $1300 when new, bike that I paid $800 for, so an extra
net $50-$60 or so in additional costs is not going to break the bank.

Quoted message said:

Quoted message said:

>
> Internet bicyclists love to waste money.

I'm only wasting it on paper, so far.

R Brickston said:

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

R Brickston said:

<[email hidden]> wrote in message
news:[email hidden]...
>R Brickston wrote:
>> <[email hidden]> wrote in message
>> news:[email hidden]...
>> >R Brickston wrote:
>> >> I'd like to swap a 52-42-30 105 crank out for either a Sugino
>> >> XD600/XD300
>> >> 46-36-26 square taper or the Nashbar Trekker 48-38-28 ISIS.
>> >>
>> >> The bike, a Trek 520, came factory with a 68/118.5mm BB. Hardly
>> >> anything
>> >> is
>> >> available in a square taper and nothing that I can find in an ISIS,
>> >> but
>> >> plenty of 118mm available. Will my chainline change much by the BB
>> >> being
>> >> off
>> >> .5 of a milimeter?
>> >
>> > Why don't you just put a 24, 26, or 28 tooth 74mm bcd inner
>> > chainring
>> > on the bike? $10-$15 and 5 minutes and you are done. That is what
>> > I
>> > did back in 1992 when I bought a Trek 520. Worked very well for
>> > many,
>> > many years. Eventually went to a 20 tooth inner ring. You have bar
>> > end shifters on the Trek 520 so there is no problems like STI has
>> > with
>> > small inner chainrings.
>>
>> I think you probably had a 110/74 BCD, this is a 105 5503 triple with
>> a
>> 130/94 and I understand a 30 tooth is as small as you can go.
>
> You need to get yourself to a competent bike shop soon before you blow
> all your money. Your Shimano 105 crankset has a 130mm bcd for the two
> outer chainrings and 74mm bcd for the inner chainring. You can put as
> low as a 24 tooth inner chainring on a 74mm bcd crank. You can go as
> low as a 38 tooth chainring for either of the two outer rings. Only
> the Shimano Dura Ace triple crankset has a goofy inner chainring size
> of 92mm bcd or something. It only goes down to 30 tooth. Only Dura
> Ace has this, not Ultegra or 105 or anything else on earth.

Oops! Absolutely right. It is a 74mm inner and will take the smaller
ring.
Thanks.

> Yes my crank was a 110/74. It takes the exact same size inner
> chainrings as a 130/74 crankset. The Sugino mentioned by the internet
> bicyclists also is a 110/74. It takes the exact same size inner
> chainring as your current Shimano 105.
>
> Spend $10 and get a 24 or 26 74mm bcd inner chainring, put it on the
> bike and be done with it. Don't blow your money on a crankset that you
> don't need.
>
> In any event,
>> that still leaves me with a 52 on top, almost unusable.
>
> If the 52 is unusable, then don't use it with the smallest cogs. You
> do know a 52x13 is an easier gear than a 46x11? The 46 is the top ring
> on the Sugino cranks mentioned on this forum. 13 is your third cog on
> your 11-32 cassette.

I got an 11-34 on the back, so without consulting a gear chart, I think
the
52 will at least throw out the 11 for top end use.

Yes 52x11 is useless. But you can just not use the 52x11. Use your
52x13 as your highest gear. An excellent high gear. Instead of a 27
speed bike, you have a 26 speed bike. And a 42 tooth chainring which
is an excellent size chainring.

And to get back to a 27 speed bike, you can very simply buy a Shimano 9
speed cassette beginning with a 13 cog, such as a 13-23 Shimano 105
cogset for $30 from Nashbar. Use the 13-14 from the 13-23 cassette to
substitute for the 11-13 on your current 11-34 cassette and you have a
very useful touring cogset of 13-14-15-17-20-23-26-30-34. 52-42
chainrings will work very well with this cassette.

The current 11-34 cogs are mounted in an alloy spyder, so they are not full
size and can't be stacked.

Forgot to say only the last 6-7 cogs of your cassette are on the alloy
spider. The first 2-3 cogs are loose with loose spacers. Except the
11 tooth with built in spacer but you would throw this one away. You
can just buy a 13-23 Shimano 9 speed cassette, cheap, and use the 13
and 14 cogs from it and then use the 15 loose cog and alloy spider cogs
from your current cassette and build up a 13-34 cassette. No need to
get a new 11-34 cassette to do this. Take your current cassette off
and look at it. It might be on an alloy spider for the last 6-7 cogs
or it might be all loose with the three little bolts from the back
holding it together. I think Trek puts pretty cheap cassettes on its
520 so would be surprised if its even at the price level of having the
cogs on an alloy spider.

Quoted message said:

Quoted message said:

And the cost will be much cheaper and the work much easier than buying
a new Sugino crankset and square taper bottom bracket. $13 for 26
inner chainring from Nashbar and $30 for Shimano 105 9 speed cogset
from Nashbar. You can find the inner chainring much cheaper from
Cambria Bike Outfitters. And when the cassette wears out, the 13-14
can be used on the next 11-34 cassette you buy since the small cogs are
not used very often and last much longer than the middle cogs. So the
$30 and $13 costs are pretty much one time expenses for the life of the
bike.

I could swap the rings out of the current crankset, maybe get some used
ones. However, I'd really rather have the exact gears *I* want... *with* the
pins and ramps.

It's not like I'm swapping out to a Dura Ace for $400. The hardly used 105
crankset and BB are worth something on Ebay; even if it's only $25 for the
pair, the delta on the replacement crank about $50-$60.

Its an '05, low mile, $1300 when new, bike that I paid $800 for, so an extra
net $50-$60 or so in additional costs is not going to break the bank.

Quoted message said:

Quoted message said:

>
> Internet bicyclists love to waste money.

I'm only wasting it on paper, so far.

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

R Brickston said:

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

R Brickston wrote:
> <[email hidden]> wrote in message
> news:[email hidden]...
> >R Brickston wrote:
> >> <[email hidden]> wrote in message
> >> news:[email hidden]...
> >> >R Brickston wrote:
> >> >> I'd like to swap a 52-42-30 105 crank out for either a Sugino
> >> >> XD600/XD300
> >> >> 46-36-26 square taper or the Nashbar Trekker 48-38-28 ISIS.
> >> >>
> >> >> The bike, a Trek 520, came factory with a 68/118.5mm BB. Hardly
> >> >> anything
> >> >> is
> >> >> available in a square taper and nothing that I can find in an
> >> >> ISIS,
> >> >> but
> >> >> plenty of 118mm available. Will my chainline change much by the
> >> >> BB
> >> >> being
> >> >> off
> >> >> .5 of a milimeter?
> >> >
> >> > Why don't you just put a 24, 26, or 28 tooth 74mm bcd inner
> >> > chainring
> >> > on the bike? $10-$15 and 5 minutes and you are done. That is
> >> > what
> >> > I
> >> > did back in 1992 when I bought a Trek 520. Worked very well for
> >> > many,
> >> > many years. Eventually went to a 20 tooth inner ring. You have
> >> > bar
> >> > end shifters on the Trek 520 so there is no problems like STI has
> >> > with
> >> > small inner chainrings.
> >>
> >> I think you probably had a 110/74 BCD, this is a 105 5503 triple
> >> with
> >> a
> >> 130/94 and I understand a 30 tooth is as small as you can go.
> >
> > You need to get yourself to a competent bike shop soon before you
> > blow
> > all your money. Your Shimano 105 crankset has a 130mm bcd for the
> > two
> > outer chainrings and 74mm bcd for the inner chainring. You can put
> > as
> > low as a 24 tooth inner chainring on a 74mm bcd crank. You can go
> > as
> > low as a 38 tooth chainring for either of the two outer rings. Only
> > the Shimano Dura Ace triple crankset has a goofy inner chainring
> > size
> > of 92mm bcd or something. It only goes down to 30 tooth. Only Dura
> > Ace has this, not Ultegra or 105 or anything else on earth.
>
> Oops! Absolutely right. It is a 74mm inner and will take the smaller
> ring.
> Thanks.
>
>
> > Yes my crank was a 110/74. It takes the exact same size inner
> > chainrings as a 130/74 crankset. The Sugino mentioned by the
> > internet
> > bicyclists also is a 110/74. It takes the exact same size inner
> > chainring as your current Shimano 105.
> >
> > Spend $10 and get a 24 or 26 74mm bcd inner chainring, put it on the
> > bike and be done with it. Don't blow your money on a crankset that
> > you
> > don't need.
> >
> > In any event,
> >> that still leaves me with a 52 on top, almost unusable.
> >
> > If the 52 is unusable, then don't use it with the smallest cogs.
> > You
> > do know a 52x13 is an easier gear than a 46x11? The 46 is the top
> > ring
> > on the Sugino cranks mentioned on this forum. 13 is your third cog
> > on
> > your 11-32 cassette.
>
> I got an 11-34 on the back, so without consulting a gear chart, I
> think
> the
> 52 will at least throw out the 11 for top end use.

Yes 52x11 is useless. But you can just not use the 52x11. Use your
52x13 as your highest gear. An excellent high gear. Instead of a 27
speed bike, you have a 26 speed bike. And a 42 tooth chainring which
is an excellent size chainring.

And to get back to a 27 speed bike, you can very simply buy a Shimano 9
speed cassette beginning with a 13 cog, such as a 13-23 Shimano 105
cogset for $30 from Nashbar. Use the 13-14 from the 13-23 cassette to
substitute for the 11-13 on your current 11-34 cassette and you have a
very useful touring cogset of 13-14-15-17-20-23-26-30-34. 52-42
chainrings will work very well with this cassette.

The current 11-34 cogs are mounted in an alloy spyder, so they are not
full
size and can't be stacked.

Quoted message said:

And the cost will be much cheaper and the work much easier than buying
a new Sugino crankset and square taper bottom bracket. $13 for 26
inner chainring from Nashbar and $30 for Shimano 105 9 speed cogset
from Nashbar. You can find the inner chainring much cheaper from
Cambria Bike Outfitters. And when the cassette wears out, the 13-14
can be used on the next 11-34 cassette you buy since the small cogs are
not used very often and last much longer than the middle cogs. So the
$30 and $13 costs are pretty much one time expenses for the life of the
bike.

I could swap the rings out of the current crankset, maybe get some used
ones. However, I'd really rather have the exact gears *I* want... *with*
the
pins and ramps.

But that is just it, you do get the exact gears you want, actually more
usable gears, by changing the cassette to a 13-34, by mixing up a 13-23
9 speed cassette and 11-34 cassette. You can find both cassettes on
sale for about $50-60 total. And a smaller 26 tooth inner chainring
for $5-10. Cambria Bike Outfitters has the 26 tooth inner chainring
for $5. Probably OK deals on the lower priced Shimano 9 speed
cassettes with all loose cogs and spacers. And of course you keep the
Shimano 105 crank with pins and ramps on the middle and outer rings.
And the rings work well with STI and the Shimano front derailleur. Do
a search on this forum and you will find many references to Shimano
front derailleurs being very specific to the middle ring size. Front
derailleurs designed for 42 tooth middle rings shift like [censored] with STI
when people put a 39 tooth middle ring on. And you want to put on a 38
or 36 middle ring with the Nashbar or Sugino cranks. And of course you
have to buy a new bottom bracket. Of unknown length while the Shimano
105 crank and bottom bracket are already correct.

A 46-36-26 crank with a 11-34 cassette has pretty much the same gearing
as a 52-42-26 with a 13-34 cassette. You can get to the same gearing
by switching the front crankset or by switching the rear cassette.
Cheaper and easier and more foolproof to change the cassette. And the
inner chainring of course.

I have to disagree. The gear inches with your suggested setup run from 86.5
to 33.1 for the middle ring. In the other setup they run from 87.6 to 28.3.
For the big ring the 105 crank runs from 107 to 40.9 and the lower geeared
crank runs 111.9 to 36.2.

R Brickston said:

<[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

R Brickston said:

<[email hidden]> wrote in message
news:[email hidden]...
>
> R Brickston wrote:
>> <[email hidden]> wrote in message
>> news:[email hidden]...
>> >R Brickston wrote:
>> >> <[email hidden]> wrote in message
>> >> news:[email hidden]...
>> >> >R Brickston wrote:
>> >> >> I'd like to swap a 52-42-30 105 crank out for either a Sugino
>> >> >> XD600/XD300
>> >> >> 46-36-26 square taper or the Nashbar Trekker 48-38-28 ISIS.
>> >> >>
>> >> >> The bike, a Trek 520, came factory with a 68/118.5mm BB. Hardly
>> >> >> anything
>> >> >> is
>> >> >> available in a square taper and nothing that I can find in an
>> >> >> ISIS,
>> >> >> but
>> >> >> plenty of 118mm available. Will my chainline change much by the
>> >> >> BB
>> >> >> being
>> >> >> off
>> >> >> .5 of a milimeter?
>> >> >
>> >> > Why don't you just put a 24, 26, or 28 tooth 74mm bcd inner
>> >> > chainring
>> >> > on the bike? $10-$15 and 5 minutes and you are done. That is
>> >> > what
>> >> > I
>> >> > did back in 1992 when I bought a Trek 520. Worked very well for
>> >> > many,
>> >> > many years. Eventually went to a 20 tooth inner ring. You have
>> >> > bar
>> >> > end shifters on the Trek 520 so there is no problems like STI has
>> >> > with
>> >> > small inner chainrings.
>> >>
>> >> I think you probably had a 110/74 BCD, this is a 105 5503 triple
>> >> with
>> >> a
>> >> 130/94 and I understand a 30 tooth is as small as you can go.
>> >
>> > You need to get yourself to a competent bike shop soon before you
>> > blow
>> > all your money. Your Shimano 105 crankset has a 130mm bcd for the
>> > two
>> > outer chainrings and 74mm bcd for the inner chainring. You can put
>> > as
>> > low as a 24 tooth inner chainring on a 74mm bcd crank. You can go
>> > as
>> > low as a 38 tooth chainring for either of the two outer rings. Only
>> > the Shimano Dura Ace triple crankset has a goofy inner chainring
>> > size
>> > of 92mm bcd or something. It only goes down to 30 tooth. Only Dura
>> > Ace has this, not Ultegra or 105 or anything else on earth.
>>
>> Oops! Absolutely right. It is a 74mm inner and will take the smaller
>> ring.
>> Thanks.
>>
>>
>> > Yes my crank was a 110/74. It takes the exact same size inner
>> > chainrings as a 130/74 crankset. The Sugino mentioned by the
>> > internet
>> > bicyclists also is a 110/74. It takes the exact same size inner
>> > chainring as your current Shimano 105.
>> >
>> > Spend $10 and get a 24 or 26 74mm bcd inner chainring, put it on the
>> > bike and be done with it. Don't blow your money on a crankset that
>> > you
>> > don't need.
>> >
>> > In any event,
>> >> that still leaves me with a 52 on top, almost unusable.
>> >
>> > If the 52 is unusable, then don't use it with the smallest cogs.
>> > You
>> > do know a 52x13 is an easier gear than a 46x11? The 46 is the top
>> > ring
>> > on the Sugino cranks mentioned on this forum. 13 is your third cog
>> > on
>> > your 11-32 cassette.
>>
>> I got an 11-34 on the back, so without consulting a gear chart, I
>> think
>> the
>> 52 will at least throw out the 11 for top end use.
>
> Yes 52x11 is useless. But you can just not use the 52x11. Use your
> 52x13 as your highest gear. An excellent high gear. Instead of a 27
> speed bike, you have a 26 speed bike. And a 42 tooth chainring which
> is an excellent size chainring.
>
> And to get back to a 27 speed bike, you can very simply buy a Shimano 9
> speed cassette beginning with a 13 cog, such as a 13-23 Shimano 105
> cogset for $30 from Nashbar. Use the 13-14 from the 13-23 cassette to
> substitute for the 11-13 on your current 11-34 cassette and you have a
> very useful touring cogset of 13-14-15-17-20-23-26-30-34. 52-42
> chainrings will work very well with this cassette.

The current 11-34 cogs are mounted in an alloy spyder, so they are not
full
size and can't be stacked.

>
> And the cost will be much cheaper and the work much easier than buying
> a new Sugino crankset and square taper bottom bracket. $13 for 26
> inner chainring from Nashbar and $30 for Shimano 105 9 speed cogset
> from Nashbar. You can find the inner chainring much cheaper from
> Cambria Bike Outfitters. And when the cassette wears out, the 13-14
> can be used on the next 11-34 cassette you buy since the small cogs are
> not used very often and last much longer than the middle cogs. So the
> $30 and $13 costs are pretty much one time expenses for the life of the
> bike.
>

I could swap the rings out of the current crankset, maybe get some used
ones. However, I'd really rather have the exact gears *I* want... *with*
the
pins and ramps.

But that is just it, you do get the exact gears you want, actually more
usable gears, by changing the cassette to a 13-34, by mixing up a 13-23
9 speed cassette and 11-34 cassette. You can find both cassettes on
sale for about $50-60 total. And a smaller 26 tooth inner chainring
for $5-10. Cambria Bike Outfitters has the 26 tooth inner chainring
for $5. Probably OK deals on the lower priced Shimano 9 speed
cassettes with all loose cogs and spacers. And of course you keep the
Shimano 105 crank with pins and ramps on the middle and outer rings.
And the rings work well with STI and the Shimano front derailleur. Do
a search on this forum and you will find many references to Shimano
front derailleurs being very specific to the middle ring size. Front
derailleurs designed for 42 tooth middle rings shift like [censored] with STI
when people put a 39 tooth middle ring on. And you want to put on a 38
or 36 middle ring with the Nashbar or Sugino cranks. And of course you
have to buy a new bottom bracket. Of unknown length while the Shimano
105 crank and bottom bracket are already correct.

A 46-36-26 crank with a 11-34 cassette has pretty much the same gearing
as a 52-42-26 with a 13-34 cassette. You can get to the same gearing
by switching the front crankset or by switching the rear cassette.
Cheaper and easier and more foolproof to change the cassette. And the
inner chainring of course.

I have to disagree. The gear inches with your suggested setup run from 86.5
to 33.1 for the middle ring. In the other setup they run from 87.6 to 28.3.
For the big ring the 105 crank runs from 107 to 40.9 and the lower geeared
crank runs 111.9 to 36.2.

Like I wrote, "actually more usable gears". You have three rings on a
triple. No point in having super low gears on the big and middle
rings. That is what the inner ring is for. Its good to have some
overlap at either end of the outer and middle rings, but not to have
100% duplication. Your alternative has a low of 28.3" on the middle
ring and a low of 36.2" on the outer ring. And about 20" for the inner
ring. Too much duplication. Or is it triplication when all three
rings are about the same. As for telling the difference between a high
of 86.5" and 87.6" on the middle... Or a high of 107" and 111.9" on
the outer ring... You need to ride more. In my suggested 13-34 setup,
you have three cogs with 1 tooth jumps, 13-14-15. 1 tooth cog jumps
are very usable. Your current 11-34 cassette goes 11-13-15. Big 2
tooth jumps when using the small cogs. You end up with more useful
gears by having 1 tooth jumps instead of 2 tooth jumps. Go ride a road
bike with a closely spaced cassette and notice how nice it is to have 1
tooth jumps between cogs. Mountain bike cassettes starting with 11 and
12 don't offer this.

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R Brickston said:

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Quoted message said:

R Brickston wrote:
> <[email hidden]> wrote in message
> news:[email hidden]...
> >
> > R Brickston wrote:
> >> <[email hidden]> wrote in message
> >> news:[email hidden]...
> >> >R Brickston wrote:
> >> >> <[email hidden]> wrote in message
> >> >> news:[email hidden]...
> >> >> >R Brickston wrote:
> >> >> >> I'd like to swap a 52-42-30 105 crank out for either a Sugino
> >> >> >> XD600/XD300
> >> >> >> 46-36-26 square taper or the Nashbar Trekker 48-38-28 ISIS.
> >> >> >>
> >> >> >> The bike, a Trek 520, came factory with a 68/118.5mm BB.
> >> >> >> Hardly
> >> >> >> anything
> >> >> >> is
> >> >> >> available in a square taper and nothing that I can find in an
> >> >> >> ISIS,
> >> >> >> but
> >> >> >> plenty of 118mm available. Will my chainline change much by
> >> >> >> the
> >> >> >> BB
> >> >> >> being
> >> >> >> off
> >> >> >> .5 of a milimeter?
> >> >> >
> >> >> > Why don't you just put a 24, 26, or 28 tooth 74mm bcd inner
> >> >> > chainring
> >> >> > on the bike? $10-$15 and 5 minutes and you are done. That is
> >> >> > what
> >> >> > I
> >> >> > did back in 1992 when I bought a Trek 520. Worked very well
> >> >> > for
> >> >> > many,
> >> >> > many years. Eventually went to a 20 tooth inner ring. You
> >> >> > have
> >> >> > bar
> >> >> > end shifters on the Trek 520 so there is no problems like STI
> >> >> > has
> >> >> > with
> >> >> > small inner chainrings.
> >> >>
> >> >> I think you probably had a 110/74 BCD, this is a 105 5503 triple
> >> >> with
> >> >> a
> >> >> 130/94 and I understand a 30 tooth is as small as you can go.
> >> >
> >> > You need to get yourself to a competent bike shop soon before you
> >> > blow
> >> > all your money. Your Shimano 105 crankset has a 130mm bcd for
> >> > the
> >> > two
> >> > outer chainrings and 74mm bcd for the inner chainring. You can
> >> > put
> >> > as
> >> > low as a 24 tooth inner chainring on a 74mm bcd crank. You can
> >> > go
> >> > as
> >> > low as a 38 tooth chainring for either of the two outer rings.
> >> > Only
> >> > the Shimano Dura Ace triple crankset has a goofy inner chainring
> >> > size
> >> > of 92mm bcd or something. It only goes down to 30 tooth. Only
> >> > Dura
> >> > Ace has this, not Ultegra or 105 or anything else on earth.
> >>
> >> Oops! Absolutely right. It is a 74mm inner and will take the
> >> smaller
> >> ring.
> >> Thanks.
> >>
> >>
> >> > Yes my crank was a 110/74. It takes the exact same size inner
> >> > chainrings as a 130/74 crankset. The Sugino mentioned by the
> >> > internet
> >> > bicyclists also is a 110/74. It takes the exact same size inner
> >> > chainring as your current Shimano 105.
> >> >
> >> > Spend $10 and get a 24 or 26 74mm bcd inner chainring, put it on
> >> > the
> >> > bike and be done with it. Don't blow your money on a crankset
> >> > that
> >> > you
> >> > don't need.
> >> >
> >> > In any event,
> >> >> that still leaves me with a 52 on top, almost unusable.
> >> >
> >> > If the 52 is unusable, then don't use it with the smallest cogs.
> >> > You
> >> > do know a 52x13 is an easier gear than a 46x11? The 46 is the
> >> > top
> >> > ring
> >> > on the Sugino cranks mentioned on this forum. 13 is your third
> >> > cog
> >> > on
> >> > your 11-32 cassette.
> >>
> >> I got an 11-34 on the back, so without consulting a gear chart, I
> >> think
> >> the
> >> 52 will at least throw out the 11 for top end use.
> >
> > Yes 52x11 is useless. But you can just not use the 52x11. Use your
> > 52x13 as your highest gear. An excellent high gear. Instead of a
> > 27
> > speed bike, you have a 26 speed bike. And a 42 tooth chainring
> > which
> > is an excellent size chainring.
> >
> > And to get back to a 27 speed bike, you can very simply buy a
> > Shimano 9
> > speed cassette beginning with a 13 cog, such as a 13-23 Shimano 105
> > cogset for $30 from Nashbar. Use the 13-14 from the 13-23 cassette
> > to
> > substitute for the 11-13 on your current 11-34 cassette and you have
> > a
> > very useful touring cogset of 13-14-15-17-20-23-26-30-34. 52-42
> > chainrings will work very well with this cassette.
>
> The current 11-34 cogs are mounted in an alloy spyder, so they are not
> full
> size and can't be stacked.
>
> >
> > And the cost will be much cheaper and the work much easier than
> > buying
> > a new Sugino crankset and square taper bottom bracket. $13 for 26
> > inner chainring from Nashbar and $30 for Shimano 105 9 speed cogset
> > from Nashbar. You can find the inner chainring much cheaper from
> > Cambria Bike Outfitters. And when the cassette wears out, the 13-14
> > can be used on the next 11-34 cassette you buy since the small cogs
> > are
> > not used very often and last much longer than the middle cogs. So
> > the
> > $30 and $13 costs are pretty much one time expenses for the life of
> > the
> > bike.
> >
>
> I could swap the rings out of the current crankset, maybe get some
> used
> ones. However, I'd really rather have the exact gears *I* want...
> *with*
> the
> pins and ramps.

But that is just it, you do get the exact gears you want, actually more
usable gears, by changing the cassette to a 13-34, by mixing up a 13-23
9 speed cassette and 11-34 cassette. You can find both cassettes on
sale for about $50-60 total. And a smaller 26 tooth inner chainring
for $5-10. Cambria Bike Outfitters has the 26 tooth inner chainring
for $5. Probably OK deals on the lower priced Shimano 9 speed
cassettes with all loose cogs and spacers. And of course you keep the
Shimano 105 crank with pins and ramps on the middle and outer rings.
And the rings work well with STI and the Shimano front derailleur. Do
a search on this forum and you will find many references to Shimano
front derailleurs being very specific to the middle ring size. Front
derailleurs designed for 42 tooth middle rings shift like [censored] with STI
when people put a 39 tooth middle ring on. And you want to put on a 38
or 36 middle ring with the Nashbar or Sugino cranks. And of course you
have to buy a new bottom bracket. Of unknown length while the Shimano
105 crank and bottom bracket are already correct.

A 46-36-26 crank with a 11-34 cassette has pretty much the same gearing
as a 52-42-26 with a 13-34 cassette. You can get to the same gearing
by switching the front crankset or by switching the rear cassette.
Cheaper and easier and more foolproof to change the cassette. And the
inner chainring of course.

I have to disagree. The gear inches with your suggested setup run from
86.5
to 33.1 for the middle ring. In the other setup they run from 87.6 to
28.3.
For the big ring the 105 crank runs from 107 to 40.9 and the lower
geeared
crank runs 111.9 to 36.2.

Like I wrote, "actually more usable gears". You have three rings on a
triple. No point in having super low gears on the big and middle
rings. That is what the inner ring is for. Its good to have some
overlap at either end of the outer and middle rings, but not to have
100% duplication. Your alternative has a low of 28.3" on the middle
ring and a low of 36.2" on the outer ring. And about 20" for the inner
ring. Too much duplication. Or is it triplication when all three
rings are about the same. As for telling the difference between a high
of 86.5" and 87.6" on the middle... Or a high of 107" and 111.9" on
the outer ring... You need to ride more. In my suggested 13-34 setup,
you have three cogs with 1 tooth jumps, 13-14-15. 1 tooth cog jumps
are very usable. Your current 11-34 cassette goes 11-13-15. Big 2
tooth jumps when using the small cogs. You end up with more useful
gears by having 1 tooth jumps instead of 2 tooth jumps. Go ride a road
bike with a closely spaced cassette and notice how nice it is to have 1
tooth jumps between cogs. Mountain bike cassettes starting with 11 and
12 don't offer this.

You need to take a loaded touring bike, say with 75 to 80 pounds of
equipment plus the extra 10-15 pounds or so for the steel bike and ride some
yourself. Try some rolling hills, such as found on the route from Brussels
to Paris for about 350km and then tell me how useful a one tooth jump is.