7/8 speed interchangeability

David Martin said:

I am a mite concerned that my rear wheel may not last the trip to York.
It is showing signs of severe knackeredness. It has an 8 speed
cassette. I was wondering whether the 7speed wheels I have for eg Igor
would be interchangeable if I just swap the cassette (and q/r skewer as
it has the trailer hitch on).

So basically, can I swap between 7 and 8 speed cassettes on teh same
wheel?

..d

8 speed cassettes are wider so you might need a spacer behind the
cassette. Your OLN might be different too, I say might because my 7
speed wasn't as narrow as it should have been, and pleasantly it will
be no sweat to squeeze a 9 speed in there when the time comes.

You still got my phone number from last year ? see you in York.

MSeries said:

David Martin said:

I am a mite concerned that my rear wheel may not last the trip to York.
It is showing signs of severe knackeredness. It has an 8 speed
cassette. I was wondering whether the 7speed wheels I have for eg Igor
would be interchangeable if I just swap the cassette (and q/r skewer as
it has the trailer hitch on).

So basically, can I swap between 7 and 8 speed cassettes on teh same
wheel?

..d

8 speed cassettes are wider so you might need a spacer behind the
cassette.

Unfortunately it is the other way round. I want to put an 8 speed on a
(currently) 7 speed hub.

Quoted message said:

Your OLN might be different too, I say might because my 7
speed wasn't as narrow as it should have been, and pleasantly it will
be no sweat to squeeze a 9 speed in there when the time comes.

OLN seems to be the same (135mm). This is on an MTB.

Quoted message said:

You still got my phone number from last year ? see you in York.

Yes (after a hurried search of my email). I also have numbers for Dave
Kahn and Arthur.

Would any of the York regulars know what sort of size the 24h Tescos is
near the racecourse? ie is it big enough to sell camping equipment? I
am considering leaving the tent and sleeping bag at home and picking up
new in York (as I need to get some for the family anyway). I'll
probably be arriving too late to visit the shops in the centre of town.

...d

David Martin said:

MSeries said:

David Martin said:

I am a mite concerned that my rear wheel may not last the trip to York.
It is showing signs of severe knackeredness. It has an 8 speed
cassette. I was wondering whether the 7speed wheels I have for eg Igor
would be interchangeable if I just swap the cassette (and q/r skewer as
it has the trailer hitch on).

So basically, can I swap between 7 and 8 speed cassettes on teh same
wheel?

..d

8 speed cassettes are wider so you might need a spacer behind the
cassette.

Unfortunately it is the other way round. I want to put an 8 speed on a
(currently) 7 speed hub.

OK a it of a bodge but you could probably break apart the 8 speed
cassette and use 7 sprockets, with the spacers from the 7 speed
cassette your indexing will be more or less OK. (8 speed sprockets are
thinner than 7 speed ones but not by much). If your shifters allow
friction mode you could use the 8 speed spacers which will be a little
bit less of a faff.

Quoted message said:

Quoted message said:

Your OLN might be different too, I say might because my 7
speed wasn't as narrow as it should have been, and pleasantly it will
be no sweat to squeeze a 9 speed in there when the time comes.

OLN seems to be the same (135mm). This is on an MTB.

Quoted message said:

You still got my phone number from last year ? see you in York.

Yes (after a hurried search of my email). I also have numbers for Dave
Kahn and Arthur.

I presume yours hasn't changed.

Quoted message said:

Would any of the York regulars know what sort of size the 24h Tescos is
near the racecourse? ie is it big enough to sell camping equipment? I
am considering leaving the tent and sleeping bag at home and picking up
new in York (as I need to get some for the family anyway). I'll
probably be arriving too late to visit the shops in the centre of town.

..d

I am not a York regular but I do remember seeing some camping gear in
the Tescos last year. Maybe call them to check.

MSeries said:

David Martin said:

MSeries said:

David Martin wrote:
> I am a mite concerned that my rear wheel may not last the trip to York.
> It is showing signs of severe knackeredness. It has an 8 speed
> cassette. I was wondering whether the 7speed wheels I have for eg Igor
> would be interchangeable if I just swap the cassette (and q/r skewer as
> it has the trailer hitch on).
>
> So basically, can I swap between 7 and 8 speed cassettes on teh same
> wheel?
>
> ..d

8 speed cassettes are wider so you might need a spacer behind the
cassette.

Unfortunately it is the other way round. I want to put an 8 speed on a
(currently) 7 speed hub.

OK a it of a bodge but you could probably break apart the 8 speed
cassette and use 7 sprockets, with the spacers from the 7 speed
cassette your indexing will be more or less OK. (8 speed sprockets are
thinner than 7 speed ones but not by much). If your shifters allow
friction mode you could use the 8 speed spacers which will be a little
bit less of a faff.

I think I'll pop along to the LBS to see if they have any rims in. That
may be the easiest (I'll have to try to find my wheel jig then.
Another alternative is to swap the freehub bodies between the wheels.
Also reasonably easy.

Quoted message said:

Quoted message said:

Quoted message said:

Your OLN might be different too, I say might because my 7
speed wasn't as narrow as it should have been, and pleasantly it will
be no sweat to squeeze a 9 speed in there when the time comes.

OLN seems to be the same (135mm). This is on an MTB.

Quoted message said:

You still got my phone number from last year ? see you in York.

Yes (after a hurried search of my email). I also have numbers for Dave
Kahn and Arthur.

I presume yours hasn't changed.

No. It is the same.

...d

Quoted message said:

Quoted message said:

Would any of the York regulars know what sort of size the 24h Tescos is
near the racecourse? ie is it big enough to sell camping equipment? I
am considering leaving the tent and sleeping bag at home and picking up
new in York (as I need to get some for the family anyway). I'll
probably be arriving too late to visit the shops in the centre of town.

..d

I am not a York regular but I do remember seeing some camping gear in
the Tescos last year. Maybe call them to check.

David Martin said:

Another alternative is to swap the freehub bodies between the wheels.
Also reasonably easy.

I had to do this last week. The one on my tourer seized. The OLN is now
less that it was and I have a tracking problem I think. Need to find
some time to fix this - and thats the real issue for me atm. finding
the time. I am looking forward toYork to relax for a few days, a short
ride on Saturday and some chillng and socialising.

MSeries said:

David Martin said:

Another alternative is to swap the freehub bodies between the wheels.
Also reasonably easy.

I had to do this last week. The one on my tourer seized. The OLN is now
less that it was and I have a tracking problem I think. Need to find
some time to fix this - and thats the real issue for me atm. finding
the time. I am looking forward toYork to relax for a few days, a short
ride on Saturday and some chillng and socialising.

Just bought a new rim (LBS is 100m up the road) so will build the wheel
tonight.

...d

In article <[email hidden]>
David Martin <[email hidden]> wrote:
<snip>

Quoted message said:

I think I'll pop along to the LBS to see if they have any rims in. That
may be the easiest (I'll have to try to find my wheel jig then.

You don't really need a jig for wheel building, although it is more
convenient. If the new rim is the same depth as the old one you can
reuse the spokes without disturbing the lacing.

Rob Morley said:

In article <[email hidden]>
David Martin <[email hidden]> wrote:
<snip>

Quoted message said:

I think I'll pop along to the LBS to see if they have any rims in. That
may be the easiest (I'll have to try to find my wheel jig then.

You don't really need a jig for wheel building, although it is more
convenient. If the new rim is the same depth as the old one you can
reuse the spokes without disturbing the lacing.

But a jig is useful if you want to do it whilst watching the E-S game
as the distaff will complain if I bring the bike into the sitting room.

I had intended to just tape the rims together and swap the spokes,
cunningly repositioning the valve hole to the correct place. Then take
up some tension and use the bike frame as a jig if I can't find mine.

...d

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

Quoted message said:

Quoted message said:

Unfortunately it is the other way round. I want to put an 8 speed on a
(currently) 7 speed hub.

OK a it of a bodge but you could probably break apart the 8 speed
cassette and use 7 sprockets, with the spacers from the 7 speed
cassette your indexing will be more or less OK. (8 speed sprockets are
thinner than 7 speed ones but not by much). If your shifters allow
friction mode you could use the 8 speed spacers which will be a little
bit less of a faff.

Close. What you actually do is take the 8 speed, take off one
sprocket/spacer, put it on the 7sp hub, possibly with an appropriate spacer
to make it slightly wider (small sprocket on the spoke end will give you
2.3mm), and you're done. Remember the shifters are 8sp, not 7sp, so using
the 8sp spacers means you don't need to use friction mode.

(although in practice, index mode will work for both spacings IME)

cheers,
clive

In article <[email hidden]>

David Martin said:

Rob Morley said:

In article <[email hidden]>
David Martin <[email hidden]> wrote:
<snip>

Quoted message said:

I think I'll pop along to the LBS to see if they have any rims in. That
may be the easiest (I'll have to try to find my wheel jig then.

You don't really need a jig for wheel building, although it is more
convenient. If the new rim is the same depth as the old one you can
reuse the spokes without disturbing the lacing.

But a jig is useful if you want to do it whilst watching the E-S game
as the distaff will complain if I bring the bike into the sitting room.

Mine might be surprised to find me watching the footy, but she wouldn't
pay much attention to a bike in the living room (although the "dining
room" is my usual workshop).

Quoted message said:

I had intended to just tape the rims together and swap the spokes,
cunningly repositioning the valve hole to the correct place. Then take
up some tension and use the bike frame as a jig if I can't find mine.

That'll do fine. I find a biro held to the seat stays with an elastic
band is good for measuring hop, and the brake blocks suffice for lateral
truth - I tend to do it mostly by feel and sound rather than looking for
the gap. Dish is set by seeing if both my thumbs will jam between the
rim and the stays by the same amount, and checked by flipping the wheel
in the frame. Don't forget to lube your nipples.
:-)

Rob Morley said:

That'll do fine. I find a biro held to the seat stays with an elastic
band is good for measuring hop, and the brake blocks suffice for lateral
truth - I tend to do it mostly by feel and sound rather than looking for
the gap. Dish is set by seeing if both my thumbs will jam between the
rim and the stays by the same amount, and checked by flipping the wheel
in the frame. Don't forget to lube your nipples.

I've built a few wheels before... It looks like it will be the radio in
the garage then..
and I will relube the nipples.

...d

Rob Morley said:

In article <[email hidden]>

David Martin said:

Rob Morley said:

In article <[email hidden]>
David Martin <[email hidden]> wrote:
<snip>
>
> I think I'll pop along to the LBS to see if they have any rims in. That
> may be the easiest (I'll have to try to find my wheel jig then.
>
You don't really need a jig for wheel building, although it is more
convenient. If the new rim is the same depth as the old one you can
reuse the spokes without disturbing the lacing.

But a jig is useful if you want to do it whilst watching the E-S game
as the distaff will complain if I bring the bike into the sitting room.

Mine might be surprised to find me watching the footy, but she wouldn't
pay much attention to a bike in the living room (although the "dining
room" is my usual workshop).

Quoted message said:

I had intended to just tape the rims together and swap the spokes,
cunningly repositioning the valve hole to the correct place. Then take
up some tension and use the bike frame as a jig if I can't find mine.

That'll do fine. I find a biro held to the seat stays with an elastic
band is good for measuring hop, and the brake blocks suffice for lateral
truth - I tend to do it mostly by feel and sound rather than looking for
the gap. Dish is set by seeing if both my thumbs will jam between the
rim and the stays by the same amount, and checked by flipping the wheel
in the frame. Don't forget to lube your nipples.

All done. Took a wee bit longer than expected but happy now. Broke two
more spokes whilst building (both drive side) but it is now acceptably
round and in the right place.

Nokian AWS are a right b*****d to fit. Very tight.

The new rims are narrower than the old ones so I might have to do some
brake adjustment.

I cut the old rim up to see just how close to failure it was. It failed
in the process - the sidewall was down to ~0.5 mm in places. I should
photograph it. However, a failre would not have catastrophically
compromised the integrity of the wheel, there would be a bang and it
would be a bit out of true, but would have still been rideable as it
would have broken in the box section rather than at the lip.

Still very glad I changed it.

And SWMBO thinks riding down to York and then acquiring sleepingbag and
tent from Tescos (I rang them, they do stock them and will put some
behind the desk for me) would be far better than lugging gear over the
Lammermuir hills. I might get away with half a pannier and a saddle
bag, almost down to Audax loading.

See you all in York!

...d

David Martin said:

See you all in York!

Yes, I hope so. Glad you are sorted and back on the road. I am
travelling to York on Frday afternoon, be arriving at about 17:00 I
predict. I'll be on pitch 95. I shall be visiting Tescos for the stores
too once I arrive and might have tea there if the cafe is still open.

Looking forward to it.

MSeries said:

David Martin said:

See you all in York!

Yes, I hope so. Glad you are sorted and back on the road.

Sort of - got to the garage this morning to dicover I had borked the
tube when struggling with the tyres. Hopefully the LBS has some of the
right size in now. I swapped the tube and just got into the lab in
time, but my spare didn't appear to be entirely sound...

Quoted message said:

I am
travelling to York on Frday afternoon, be arriving at about 17:00 I
predict. I'll be on pitch 95. I shall be visiting Tescos for the stores
too once I arrive and might have tea there if the cafe is still open.

I've not yet booked a pitch and will probably arrive much later.
Will call when I arrive.

Quoted message said:

Looking forward to it.

AOL

...d

In article <[email hidden]>
David Martin <[email hidden]> wrote:
<snip>

Quoted message said:

All done. Took a wee bit longer than expected but happy now. Broke two
more spokes whilst building (both drive side)

That would worry me. Are the pulling spokes on the inside or the
outside of the flange?

Rob Morley said:

In article <[email hidden]>
David Martin <[email hidden]> wrote:
<snip>

Quoted message said:

All done. Took a wee bit longer than expected but happy now. Broke two
more spokes whilst building (both drive side)

That would worry me. Are the pulling spokes on the inside or the
outside of the flange?

It doesn't worry me too much giventeh abuse this wheel has had. I think
I overtightened them a wee bit, but they were fairly knackered to start
with. They broke at the butting, not at the bend, and were parallel on
the drive side so one in, one out.
Swapped for new ones and it is all fine.

I'll get the pictures up RSN but not till after York.

...d