Chainrings for Campy Mirage

* * Chas said:

I picked up a used Campy Mirage crankset with 53/39 chainrings.

I don't use front index shifting and I'm planning or running this with 7
or 8 speed cassettes. I'm not familiar with Campy's pins and ramps or
chainring spacing.

The 53 tooth chainring is a little tall for me, I've used 49/13 top gears
for years. It looks like Campy had or has 50 tooth chainring for this
crank. If I find a Campy 50 tooth chainring will it work OK with my
existing 39 tooth chainring.

My understanding is that the pins are "timed" to be positioned around the
ring, so that they line up with in the middle of a link on the smaller ring
(not a pin), and lift it onto the middle of the ramped tooth of the larger
ring.

If the rings weren't timed to be put together, it might put the roller on
top of the tooth, and it'd take a little while for the chain to snap into
the gaps properly.

Perfect timing of ramps and pins isn't essential. My triple use a
Specialites TA 28t small ring with a middle designed to lift of a 30t, and
it is only very slightly worse at shifting.

Any ring with a 135 BCD should work, by the way, it doesn't have to be
Campag, but of course the timing will be better if you get a Campag big
ring designed to carry from a 39t. Quite a few makers do rings with that
BCD.

In article
<[email hidden]>,

* * Chas said:

I picked up a used Campy Mirage crankset with 53/39 chainrings.

I don't use front index shifting and I'm planning or running this with 7
or 8 speed cassettes. I'm not familiar with Campy's pins and ramps or
chainring spacing.

The 53 tooth chainring is a little tall for me, I've used 49/13 top gears
for years. It looks like Campy had or has 50 tooth chainring for this
crank. If I find a Campy 50 tooth chainring will it work OK with my
existing 39 tooth chainring.

What about a generic 49 or 50 tooth chainring?

What width chains work with these chainrings?

How can that 53 be much of a problem, given that you
contemplate a 50? My 48/13 high gear is plenty when
what I can spin is the only consideration. Yet, I like
to spill the derailleur and poke along in the tallest
gear sometimes because it requires little effort; hence
I am considering a 53 chain wheel on my 24-38-48 and
13-23 nine-speed.

To your point: do you want the absolute snappiest
shifting? If not your proposed change will shift slower
but not to frustrate you. For the very best shifting a
46-49 half-step.

--
Michael Press

Michael Press said:

In article
<[email hidden]>,

* * Chas said:

I picked up a used Campy Mirage crankset with 53/39 chainrings.

I don't use front index shifting and I'm planning or running this
with 7 or 8 speed cassettes. I'm not familiar with Campy's pins and
ramps or chainring spacing.

The 53 tooth chainring is a little tall for me, I've used 49/13 top
gears for years. It looks like Campy had or has 50 tooth chainring
for this crank. If I find a Campy 50 tooth chainring will it work OK
with my existing 39 tooth chainring.

Yes.

Quoted message said:

Quoted message said:

What about a generic 49 or 50 tooth chainring?

They work pretty well. Stronglight, TA and others make them.

Quoted message said:

Quoted message said:

What width chains work with these chainrings?

Any. But stick with what your cassette requires.

Quoted message said:

How can that 53 be much of a problem, given that you
contemplate a 50?

A smaller ring is nicer when you don't mind having lower top gears. It can
be used more of the time without having to cross the chain over so much.

Quoted message said:

My 48/13 high gear is plenty when
what I can spin is the only consideration. Yet, I like
to spill the derailleur and poke along in the tallest
gear sometimes because it requires little effort; hence
I am considering a 53 chain wheel on my 24-38-48 and
13-23 nine-speed.

Your front derailleur will need raising, then may work poorly with such a
wide range. A 50 or 51 would be better with a 24 granny. (TA make a 51).

~PB

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

Quoted message said:

In article
<[email hidden]>,

* * Chas said:

I picked up a used Campy Mirage crankset with 53/39 chainrings.

I don't use front index shifting and I'm planning or running this with

7

Quoted message said:

Quoted message said:

or 8 speed cassettes. I'm not familiar with Campy's pins and ramps or
chainring spacing.

The 53 tooth chainring is a little tall for me, I've used 49/13 top

gears

Quoted message said:

Quoted message said:

for years. It looks like Campy had or has 50 tooth chainring for this
crank. If I find a Campy 50 tooth chainring will it work OK with my
existing 39 tooth chainring.

What about a generic 49 or 50 tooth chainring?

What width chains work with these chainrings?

How can that 53 be much of a problem, given that you
contemplate a 50? My 48/13 high gear is plenty when
what I can spin is the only consideration. Yet, I like
to spill the derailleur and poke along in the tallest
gear sometimes because it requires little effort; hence
I am considering a 53 chain wheel on my 24-38-48 and
13-23 nine-speed.

To your point: do you want the absolute snappiest
shifting? If not your proposed change will shift slower
but not to frustrate you. For the very best shifting a
46-49 half-step.

--
Michael Press

Most of my riding is done in the 50-80 inch range. I've been using
half-step gearing with 45-49 chainrings and 13-24, 13-26 or 13-28 five or
six speed freewheels for years.

I've switched to crossover shifting with 7 and 8 speed cassettes. It looks
like Campy only made 53 and 50 tooth large chainrings for this crankset. I
don't want to use a 53 tooth chainring for a lot of different reasons.

My questions concerned using my existing 39 tooth chainring with a Campy
50 tooth chainring or another brand of 49 or 50 tooth chainring and how
that will effect shifting with this crank.

I've heard that there can be shifting problems with miss-matched
chainrings that use pins and ramps. Since I wont be using front indexing
how much of a problem is that going to be if at all. Will this crank
friction shift as well as an old fashioned pre index crankset?

Chas.

* * Chas said:

I picked up a used Campy Mirage crankset with 53/39 chainrings.

I don't use front index shifting and I'm planning or running this with 7
or 8 speed cassettes. I'm not familiar with Campy's pins and ramps or
chainring spacing.

The 53 tooth chainring is a little tall for me, I've used 49/13 top gears
for years. It looks like Campy had or has 50 tooth chainring for this
crank. If I find a Campy 50 tooth chainring will it work OK with my
existing 39 tooth chainring.

What about a generic 49 or 50 tooth chainring?

What width chains work with these chainrings?

Chas.

Any width chain, the chainrings didn't change in thickness when they
went from 8s to 9s. I have been using 50/39 for probably 10 years..53
is too tall for just about everybody whether they admit it or not.
Campag has a 50t ring(135mm BCD) from their triple and TA makes CRs
for 135 from 39 to 56, 1 tooth increments.

* * Chas said:

"Michael Press" <[email hidden]> wrote in message

news:[email hidden]...

Quoted message said:

In article
<[email hidden]>,
"* * Chas" <[email hidden]> wrote:

Quoted message said:

Quoted message said:

I picked up a used Campy Mirage crankset with 53/39 chainrings.

Quoted message said:

Quoted message said:

I don't use front index shifting and I'm planning or running this with

7

Quoted message said:

Quoted message said:

or 8 speed cassettes. I'm not familiar with Campy's pins and ramps or
chainring spacing.

Quoted message said:

Quoted message said:

The 53 tooth chainring is a little tall for me, I've used 49/13 top

gears

Quoted message said:

Quoted message said:

for years. It looks like Campy had or has 50 tooth chainring for this
crank. If I find a Campy 50 tooth chainring will it work OK with my
existing 39 tooth chainring.

Quoted message said:

Quoted message said:

What about a generic 49 or 50 tooth chainring?

Quoted message said:

Quoted message said:

What width chains work with these chainrings?

Quoted message said:

How can that 53 be much of a problem, given that you
contemplate a 50? My 48/13 high gear is plenty when
what I can spin is the only consideration. Yet, I like
to spill the derailleur and poke along in the tallest
gear sometimes because it requires little effort; hence
I am considering a 53 chain wheel on my 24-38-48 and
13-23 nine-speed.

Quoted message said:

To your point: do you want the absolute snappiest
shifting? If not your proposed change will shift slower
but not to frustrate you. For the very best shifting a
46-49 half-step.

Quoted message said:

--
Michael Press

Most of my riding is done in the 50-80 inch range. I've been using
half-step gearing with 45-49 chainrings and 13-24, 13-26 or 13-28 five or
six speed freewheels for years.

I've switched to crossover shifting with 7 and 8 speed cassettes. It looks
like Campy only made 53 and 50 tooth large chainrings for this crankset. I
don't want to use a 53 tooth chainring for a lot of different reasons.

Makes 53, 52 and 50.

Quoted message said:

My questions concerned using my existing 39 tooth chainring with a Campy
50 tooth chainring or another brand of 49 or 50 tooth chainring and how
that will effect shifting with this crank.

It'll be fine, nothing to fret over.

Quoted message said:

I've heard that there can be shifting problems with miss-matched
chainrings that use pins and ramps. Since I wont be using front indexing
how much of a problem is that going to be if at all. Will this crank
friction shift as well as an old fashioned pre index crankset?

Once upon a time, long, long ago, in a galaxy...there were NO pins,
ramps and doo-dads on chainrings and shifting up and down was no
problema. Just a little reduced pedal pressure whilst pedaling and up
and down it will go.

Quoted message said:

Chas.

Only Shimano has indexed shifting on the front

You'll have a difficult time finding a "generic" chain ring with the
appropriate bolt circle diameter. Campy would be easier to find and
perhaps the same price.

Don't worry about ramps and pins. They'll not interefere even if
mis-matched. I had them explained to me this way... Shifting is a wee
bit better if the chain tension is relaxed a wee bit. The ramps are
designed so that the chain moves when the cranks are vertical ("top dead
center", considered a bit of a "dead spot" in the stroke).

The lowest-end Sachs 8 or 9 speed chain will work just fine up front.

* * Chas said:

I picked up a used Campy Mirage crankset with 53/39 chainrings.

I don't use front index shifting and I'm planning or running this with 7
or 8 speed cassettes. I'm not familiar with Campy's pins and ramps or
chainring spacing.

The 53 tooth chainring is a little tall for me, I've used 49/13 top gears
for years. It looks like Campy had or has 50 tooth chainring for this
crank. If I find a Campy 50 tooth chainring will it work OK with my
existing 39 tooth chainring.

What about a generic 49 or 50 tooth chainring?

What width chains work with these chainrings?

Chas.

Camp has front index on their FB shifters. I have a pair. You need
the right Camp front der.
I believe that a brand new Mirage 06 crank is only $123, depending on
where you shop. Most chainring for a 130bsd are not cheap. A pair of
Camp chainrings is more then the whole crank, as distributors in the
US only bring in Cen/Chorus/Rec. rings.

"Qui si parla Campagnolo" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

On Feb 4, 5:55 am, "* * Chas" <[email hidden]> wrote:

<snip>

Quoted message said:

Quoted message said:

Most of my riding is done in the 50-80 inch range. I've been using
half-step gearing with 45-49 chainrings and 13-24, 13-26 or 13-28 five

or

Quoted message said:

Quoted message said:

six speed freewheels for years.

I've switched to crossover shifting with 7 and 8 speed cassettes. It

looks

Quoted message said:

Quoted message said:

like Campy only made 53 and 50 tooth large chainrings for this

crankset. I

Quoted message said:

Quoted message said:

don't want to use a 53 tooth chainring for a lot of different reasons.

Makes 53, 52 and 50.

Quoted message said:

My questions concerned using my existing 39 tooth chainring with a

Campy

Quoted message said:

Quoted message said:

50 tooth chainring or another brand of 49 or 50 tooth chainring and

how

Quoted message said:

Quoted message said:

that will effect shifting with this crank.

It'll be fine, nothing to fret over.

Quoted message said:

I've heard that there can be shifting problems with miss-matched
chainrings that use pins and ramps. Since I wont be using front

indexing

Quoted message said:

Quoted message said:

how much of a problem is that going to be if at all. Will this crank
friction shift as well as an old fashioned pre index crankset?

Once upon a time, long, long ago, in a galaxy...there were NO pins,
ramps and doo-dads on chainrings and shifting up and down was no
problema. Just a little reduced pedal pressure whilst pedaling and up
and down it will go.

Quoted message said:

Thanks oh great master of the Campagnolo, that's what I needed to know.

Chas.

"Qui si parla Campagnolo" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

* * Chas said:

I picked up a used Campy Mirage crankset with 53/39 chainrings.

I don't use front index shifting and I'm planning or running this with

7

Quoted message said:

Quoted message said:

or 8 speed cassettes. I'm not familiar with Campy's pins and ramps or
chainring spacing.

The 53 tooth chainring is a little tall for me, I've used 49/13 top

gears

Quoted message said:

Quoted message said:

for years. It looks like Campy had or has 50 tooth chainring for this
crank. If I find a Campy 50 tooth chainring will it work OK with my
existing 39 tooth chainring.

What about a generic 49 or 50 tooth chainring?

What width chains work with these chainrings?

Chas.

Any width chain, the chainrings didn't change in thickness when they
went from 8s to 9s. I have been using 50/39 for probably 10 years..53
is too tall for just about everybody whether they admit it or not.
Campag has a 50t ring(135mm BCD) from their triple and TA makes CRs
for 135 from 39 to 56, 1 tooth increments.

Thanks. I have a 53t chainring that I used to use with a corncob freewheel
for flat time trials long, long ago.

Chas.

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

Quoted message said:

Camp has front index on their FB shifters. I have a pair. You need
the right Camp front der.
I believe that a brand new Mirage 06 crank is only $123, depending on
where you shop. Most chainring for a 130bsd are not cheap. A pair of
Camp chainrings is more then the whole crank, as distributors in the
US only bring in Cen/Chorus/Rec. rings.

I got the crankset real cheap with a used frameset that I got a good deal
on. I don't want to have to pay more for a chainring than the crankset
cost me. It wouldn't be in the spirit of building a beater bike. ;-)

Chas.

* * Chas said:

<[email hidden]> wrote in message

news:[email hidden]...

Quoted message said:

Camp has front index on their FB shifters. I have a pair. You need
the right Camp front der.
I believe that a brand new Mirage 06 crank is only $123, depending on
where you shop. Most chainring for a 130bsd are not cheap. A pair of
Camp chainrings is more then the whole crank, as distributors in the
US only bring in Cen/Chorus/Rec. rings.

I got the crankset real cheap with a used frameset that I got a good deal
on. I don't want to have to pay more for a chainring than the crankset
cost me. It wouldn't be in the spirit of building a beater bike. ;-)

Chas.

Stronglight makes 135 mm bcd chainrings. Go over to the Settle Cycles
website and look for chainrings. 39, 42, 46, 48, 50, 52, 53, 54, 55
sizes listed. Obviously it does not make economic sense to import
just one chainring. But there may be US places carrying Stronglight
chainrings. Nashbar has the 135mm bcd in 53 tooth. Used to have 39
tooth too. I would guess they were Stronglight brand since other
Nashbar chainrings I purchased were Stronglight. Salsa Cycles shows
39, 42, 45, 52, 53 sizes on their website. Harris Cyclery shows a few
more Salsa sizes in 135mm bcd.

Quoted message said:

Quoted message said:

* * Chas said:

I picked up a used Campy Mirage crankset with 53/39 chainrings.
I don't use front index shifting and I'm planning or running this with

7

Quoted message said:

Quoted message said:

or 8 speed cassettes. I'm not familiar with Campy's pins and ramps or
chainring spacing.
The 53 tooth chainring is a little tall for me, I've used 49/13 top

gears

Quoted message said:

Quoted message said:

for years. It looks like Campy had or has 50 tooth chainring for this
crank. If I find a Campy 50 tooth chainring will it work OK with my
existing 39 tooth chainring.
What about a generic 49 or 50 tooth chainring?
What width chains work with these chainrings?

Quoted message said:

"Michael Press" <[email hidden]> wrote

Quoted message said:

How can that 53 be much of a problem, given that you
contemplate a 50? My 48/13 high gear is plenty when
what I can spin is the only consideration. Yet, I like
to spill the derailleur and poke along in the tallest
gear sometimes because it requires little effort; hence
I am considering a 53 chain wheel on my 24-38-48 and
13-23 nine-speed.

To your point: do you want the absolute snappiest
shifting? If not your proposed change will shift slower
but not to frustrate you. For the very best shifting a
46-49 half-step.

* * Chas said:

Most of my riding is done in the 50-80 inch range. I've been using
half-step gearing with 45-49 chainrings and 13-24, 13-26 or 13-28 five or
six speed freewheels for years.

I've switched to crossover shifting with 7 and 8 speed cassettes. It looks
like Campy only made 53 and 50 tooth large chainrings for this crankset. I
don't want to use a 53 tooth chainring for a lot of different reasons.

My questions concerned using my existing 39 tooth chainring with a Campy
50 tooth chainring or another brand of 49 or 50 tooth chainring and how
that will effect shifting with this crank.

I've heard that there can be shifting problems with miss-matched
chainrings that use pins and ramps. Since I wont be using front indexing
how much of a problem is that going to be if at all. Will this crank
friction shift as well as an old fashioned pre index crankset?

It's fine with friction or Ergo micro-step front shifters. The ramp/pin
alignment is critical for "Push & Pray" STi shifters but merely
nice-to-have with other front systems.

But do try to get a ramped and/or pinned outer. It will certainly shift
much more responsively than classic pre-enhancement rings. Which did, by
the way, work acceptably.

--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

Quoted message said:

* * Chas said:

I picked up a used Campy Mirage crankset with 53/39 chainrings.
I don't use front index shifting and I'm planning or running this with 7
or 8 speed cassettes. I'm not familiar with Campy's pins and ramps or
chainring spacing.
The 53 tooth chainring is a little tall for me, I've used 49/13 top gears
for years. It looks like Campy had or has 50 tooth chainring for this
crank. If I find a Campy 50 tooth chainring will it work OK with my
existing 39 tooth chainring.
What about a generic 49 or 50 tooth chainring?
What width chains work with these chainrings?

richard said:

Only Shimano has indexed shifting on the front
You'll have a difficult time finding a "generic" chain ring with the
appropriate bolt circle diameter. Campy would be easier to find and
perhaps the same price.
Don't worry about ramps and pins. They'll not interfere even if
mis-matched. I had them explained to me this way... Shifting is a wee
bit better if the chain tension is relaxed a wee bit. The ramps are
designed so that the chain moves when the cranks are vertical ("top dead
center", considered a bit of a "dead spot" in the stroke).
The lowest-end Sachs 8 or 9 speed chain will work just fine up front.

Generally right but why, "have a difficult time finding a "generic"
chain ring" ? Campagnolo in 2 grades (VEL-MIR or CEN-CHR, the latter
wear _much_ longer), TA, TA Pro in colors (more than CA), Vuelta
(cheapest, around $30) all from national distributors available to any
competent LBS with a working telephone connection. And an inclination to
help instead of whine.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

In article
<[email hidden]>,

* * Chas said:

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

Quoted message said:

In article
<[email hidden]>,

* * Chas said:

I picked up a used Campy Mirage crankset with 53/39 chainrings.

I don't use front index shifting and I'm planning or running this with

7

Quoted message said:

Quoted message said:

or 8 speed cassettes. I'm not familiar with Campy's pins and ramps or
chainring spacing.

The 53 tooth chainring is a little tall for me, I've used 49/13 top

gears

Quoted message said:

Quoted message said:

for years. It looks like Campy had or has 50 tooth chainring for this
crank. If I find a Campy 50 tooth chainring will it work OK with my
existing 39 tooth chainring.

What about a generic 49 or 50 tooth chainring?

What width chains work with these chainrings?

How can that 53 be much of a problem, given that you
contemplate a 50? My 48/13 high gear is plenty when
what I can spin is the only consideration. Yet, I like
to spill the derailleur and poke along in the tallest
gear sometimes because it requires little effort; hence
I am considering a 53 chain wheel on my 24-38-48 and
13-23 nine-speed.

To your point: do you want the absolute snappiest
shifting? If not your proposed change will shift slower
but not to frustrate you. For the very best shifting a
46-49 half-step.

--
Michael Press

Most of my riding is done in the 50-80 inch range. I've been using
half-step gearing with 45-49 chainrings and 13-24, 13-26 or 13-28 five or
six speed freewheels for years.

I've switched to crossover shifting with 7 and 8 speed cassettes. It looks
like Campy only made 53 and 50 tooth large chainrings for this crankset. I
don't want to use a 53 tooth chainring for a lot of different reasons.

My questions concerned using my existing 39 tooth chainring with a Campy
50 tooth chainring or another brand of 49 or 50 tooth chainring and how
that will effect shifting with this crank.

I've heard that there can be shifting problems with miss-matched
chainrings that use pins and ramps. Since I wont be using front indexing
how much of a problem is that going to be if at all. Will this crank
friction shift as well as an old fashioned pre index crankset?

Yes, 39-50 will shift great. Friction shifting my TA
38-48 chain rings is easy.

--
Michael Press

* * Chas said:

"Qui si parla Campagnolo" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

* * Chas said:

I picked up a used Campy Mirage crankset with 53/39 chainrings.

I don't use front index shifting and I'm planning or running this with

7

Quoted message said:

Quoted message said:

or 8 speed cassettes. I'm not familiar with Campy's pins and ramps or
chainring spacing.

The 53 tooth chainring is a little tall for me, I've used 49/13 top

gears

Quoted message said:

Quoted message said:

for years. It looks like Campy had or has 50 tooth chainring for this
crank. If I find a Campy 50 tooth chainring will it work OK with my
existing 39 tooth chainring.

What about a generic 49 or 50 tooth chainring?

What width chains work with these chainrings?

Chas.

Any width chain, the chainrings didn't change in thickness when they
went from 8s to 9s. I have been using 50/39 for probably 10 years..53
is too tall for just about everybody whether they admit it or not.
Campag has a 50t ring(135mm BCD) from their triple and TA makes CRs
for 135 from 39 to 56, 1 tooth increments.

Thanks. I have a 53t chainring that I used to use with a corncob freewheel
for flat time trials long, long ago.

Chas.

Dear Peter & Chas,

I have a 53-tooth front sprocket. It's worked fine for years on most
of my daily ride with an 11-tooth rear and a glacial cadence.

Cheers,

Carl Fogel

A Muzi said:

Generally right but why, "have a difficult time finding a "generic"
chain ring" ? Campagnolo in 2 grades (VEL-MIR or CEN-CHR, the latter
wear _much_ longer), TA, TA Pro in colors (more than CA), Vuelta
(cheapest, around $30) all from national distributors available to any
competent LBS with a working telephone connection.

Just make sure that the generic one is fully compatible. A Miche chain
ring I bought was thinner than the original Campagnolo, so that the
fixing bolts wouldn't tighten properly. Tried shims between the ring
and the crank, but that just made the gap wide enough for the chain to
get stuck between the rings (though not right at the start), so
eventually I ended up replacing the whole crankset (got the new one
dirt-cheap, otherwise I could of course just have tried with new bolts
instead).

A Muzi said:

Quoted message said:

* * Chas said:

I picked up a used Campy Mirage crankset with 53/39 chainrings.
I don't use front index shifting and I'm planning or running this with 7
or 8 speed cassettes. I'm not familiar with Campy's pins and ramps or
chainring spacing.
The 53 tooth chainring is a little tall for me, I've used 49/13 top gears
for years. It looks like Campy had or has 50 tooth chainring for this
crank. If I find a Campy 50 tooth chainring will it work OK with my
existing 39 tooth chainring.
What about a generic 49 or 50 tooth chainring?
What width chains work with these chainrings?

richard said:

Only Shimano has indexed shifting on the front
You'll have a difficult time finding a "generic" chain ring with the
appropriate bolt circle diameter. Campy would be easier to find and
perhaps the same price.
Don't worry about ramps and pins. They'll not interfere even if
mis-matched. I had them explained to me this way... Shifting is a wee
bit better if the chain tension is relaxed a wee bit. The ramps are
designed so that the chain moves when the cranks are vertical ("top dead
center", considered a bit of a "dead spot" in the stroke).
The lowest-end Sachs 8 or 9 speed chain will work just fine up front.

Generally right but why, "have a difficult time finding a "generic"
chain ring" ? Campagnolo in 2 grades (VEL-MIR or CEN-CHR, the latter
wear _much_ longer), TA, TA Pro in colors (more than CA), Vuelta
(cheapest, around $30) all from national distributors available to any
competent LBS with a working telephone connection. And an inclination to
help instead of whine.
--
Andrew Muziwww.yellowjersey.org
Open every day since 1 April, 1971

C'mon Andy, if it ain't 'MAILORDER', it doesn't exist...

On 5 Feb 2007 06:12:53 -0800, "Qui si parla Campagnolo" <[email hidden]>

Quoted message said:

A Muzi said:

Quoted message said:

* * Chas wrote:
> I picked up a used Campy Mirage crankset with 53/39 chainrings.
> I don't use front index shifting and I'm planning or running this with 7
> or 8 speed cassettes. I'm not familiar with Campy's pins and ramps or
> chainring spacing.
> The 53 tooth chainring is a little tall for me, I've used 49/13 top gears
> for years. It looks like Campy had or has 50 tooth chainring for this
> crank. If I find a Campy 50 tooth chainring will it work OK with my
> existing 39 tooth chainring.
> What about a generic 49 or 50 tooth chainring?
> What width chains work with these chainrings?

richard said:

Only Shimano has indexed shifting on the front
You'll have a difficult time finding a "generic" chain ring with the
appropriate bolt circle diameter. Campy would be easier to find and
perhaps the same price.
Don't worry about ramps and pins. They'll not interfere even if
mis-matched. I had them explained to me this way... Shifting is a wee
bit better if the chain tension is relaxed a wee bit. The ramps are
designed so that the chain moves when the cranks are vertical ("top dead
center", considered a bit of a "dead spot" in the stroke).
The lowest-end Sachs 8 or 9 speed chain will work just fine up front.

Generally right but why, "have a difficult time finding a "generic"
chain ring" ? Campagnolo in 2 grades (VEL-MIR or CEN-CHR, the latter
wear _much_ longer), TA, TA Pro in colors (more than CA), Vuelta
(cheapest, around $30) all from national distributors available to any
competent LBS with a working telephone connection. And an inclination to
help instead of whine.
--
Andrew Muzi www.yellowjersey.org
Open every day since 1 April, 1971

C'mon Andy, if it ain't 'MAILORDER', it doesn't exist...

How is your branch of the industry going to fix that perception? See the mail
order people are really good at getting people's attention and letting them know
what they have available and it is so much that people often don't realize how
much more there is to be had from a real shop. A lot of the, uhh, fancier* shops
don't want to sell anything that the MO guys don't also carry (except for the
bikes that can't go MO) so they help promote the idea that there are only
recent, large, expensive parts available and you should just buy a new bike
instead of an 8s chainring.

*AKA: Greedy, barely competent yuppie traps.

Ron