10sp Campy or Shimano cranks with 6sp cassette



I need to replace the cranks on my 1985 Peugeot 12-speed. I'm having
trouble finding used cranks that were designed to be set up with a 6sp
cassette.

If I get new cranks by Campy or Shimano designed to be set up with a
10sp cassette, will I be able to make them work with my 6sp cassette
for the time being?

Anyone's best guess would be helpful. I can provide more specifics if
necessary.

Thanks ~

- Brooks
 
L

landotter

Guest
If you're in the US, Nashbar has their house cranks with 53/39 and a
square taper on sale for $45, add a new 7 spd freewheel and new narrow
HG chain, and you're good to go:

http://www.nashbar.com/profile.cfm?...and=&sku=15120&storetype=&estoreid=&pagename=
http://www.nashbar.com/profile.cfm?...and=&sku=11696&storetype=&estoreid=&pagename=

It's mainly a chain thing, afaik, an old chain may rub the outer ring
when using smaller rear sprockets with the inner chainring.

You should easily be able to find cranks intended for 7/8 spd, but even
9 spd cranks with a new narrow chain *should* be fine. Just watch out
for octalink cranks, you likely need good 'ole square taper.
 
Dear Brooks,

Get the crank of your dreams, if you wish. And get a Sedis 8 speed
chain to go with it. You'll be OK with the 6-speed freewheel.

Or you could get a set of cheapo 8-speed or less cranx, or used. If
you put out a call on this list I bet you could get a ton of used
cranks - contact me off, I've got some stuff. But so does half this
list.

Goiod luck

jn

"Thursday"
 
H

Herve Henry

Guest
[email protected] wrote:
> I need to replace the cranks on my 1985 Peugeot 12-speed. I'm having
> trouble finding used cranks that were designed to be set up with a 6sp
> cassette.
>
> If I get new cranks by Campy or Shimano designed to be set up with a
> 10sp cassette, will I be able to make them work with my 6sp cassette
> for the time being?
>
> Anyone's best guess would be helpful. I can provide more specifics if
> necessary.
>


I do use such a set up (I am not sure: it is a stronglight asphalt
triple with 6 speed helicomatic or regular HG 6 speed freewheel and on
the other bike: a campy racing triple with regular HG 7speed cassette)
and I do not have any problem. (The chain is HG 7speed and the previous
one was old something). Shifting is fine as far as I can tell but I
don't change much chainrings. I would guess that changing crank, the
cassette (if it is a cassette) or the freewheel and the chain will do
the job.
Herve
 
H

Herve Henry

Guest
Forgot to talk about the BB problem. This may be a problem because of
Peugeot using french/swiss thread for the BB. In this case, it will be
difficult to change bottom bracket (hard to find parts or expensive) and
this may cause problemes with new cranks becauise of chainline issues.
At this point you might be better off (economically) buying a new/recent
bike (sad to say so).

Herve
 
Q

Qui si parla Campagnolo

Guest
[email protected] wrote:
> I need to replace the cranks on my 1985 Peugeot 12-speed. I'm having
> trouble finding used cranks that were designed to be set up with a 6sp
> cassette.
>
> If I get new cranks by Campy or Shimano designed to be set up with a
> 10sp cassette, will I be able to make them work with my 6sp cassette
> for the time being?
>
> Anyone's best guess would be helpful. I can provide more specifics if
> necessary.
>
> Thanks ~
>
> - Brooks


Just put them on. A 6/7/8s chain will work fine with a '10s' crank and
rings, no problem.
 
Hi Herve,

Thanks for your comments in this regard. I am lucky on one hand
because the Peugeot is an '85 with an english threaded BB, thank
goodness.

However the reason I am so keen on changing the cranks and not the
cassette is because the hub is helicomatic, meaning finding a different
cassette is challenging at best. Eventually I will have to replace
this hub but for now I am trying to avoid it to save money.

- Brooks


Herve Henry wrote:
> Forgot to talk about the BB problem. This may be a problem because of
> Peugeot using french/swiss thread for the BB. In this case, it will be
> difficult to change bottom bracket (hard to find parts or expensive) and
> this may cause problemes with new cranks becauise of chainline issues.
> At this point you might be better off (economically) buying a new/recent
> bike (sad to say so).
>
> Herve
 
H

Herve Henry

Guest
[email protected] wrote:

> However the reason I am so keen on changing the cranks and not the
> cassette is because the hub is helicomatic, meaning finding a different
> cassette is challenging at best. Eventually I will have to replace
> this hub but for now I am trying to avoid it to save money.



Have had the same problem (peugeot circa 85 ventoux) but since the
helicomatic was behaving weirdly sometimes (maybe not freewheeling once
in a while), and the front one was not so smooth, I did change the
wheels. And at the end of the day, I might have been better of with a
new bike (except for the look).

Herve

ps: is there anyone knowledgable who could tell me what is the thread of
the BB of a 6sp ventoux of circa 85 sold in France. The tubing is
reynolds 501, the crankset is stronglight something, the hubs are
helicomatic, the derailleur huret something and the brakes weinman 570
top with "modern" alen (hexagonal) fastenning.