max speed drivetrain on 126mm spread?
05-25-10 | 11:57 PM
#1
Thread Starter
grad stud.
Joined: Apr 2010
Posts: 674
Likes: 1
From: Houston, TX
Bikes: 1987 Schwinn Voyageur
max speed drivetrain on 126mm spread?
I just spread a 126mm frame to 130mm, but I noticed that the rear stays of 9-speed bikes are shaped/bent a little differently, and a few people have told me that this is to allow for a 9 speed rear cassette. Is there a maximum speed drivetrain that can be accomodated by the old style of stays?
05-26-10 | 12:11 AM
#2
FBoD Member at Large
Joined: Aug 2008
Posts: 6,094
Likes: 8
From: Woodbury, MN
I have 7-speed running on my 126mm Fuji and just for fun I put my spare Shimano WH-RS10 wheel with a 10-speed 11-23 cassette on it (spread by hand...wasn't too hard) and had plenty of clearance. I'd imagine I would have had enough with a 12T small cog too. Bigger than that? I dunno.
05-26-10 | 12:22 AM
#3
Full Member
Joined: Apr 2007
Posts: 257
Likes: 26
Shimano introduced the 8 speed cassette with 130mm spacing about 88 or 89. Back then there were no bike mfrs. making 130mm spaced rear ends. Shimano designed the first 130mm hub to be forced into 126mm stays. After all each stay is only 2mm on each side. Once you have the 130mm hub in, you can run 8, 8, 9, or 10 speeds.
05-26-10 | 12:43 AM
#4
Senior Member
Joined: Jul 2009
Posts: 11,128
Likes: 39
Bikes: 1986 Alan Record Carbonio, 1985 Vitus Plus Carbone 7, 1984 Peugeot PSV, 1972 Line Seeker, 1986(est.) Medici Aerodynamic (Project), 1985(est.) Peugeot PY10FC
Without coldset spreading, 126mm = 7 speed, max, with narrow chain. From there, spread as much as you can or dare...?? Steel frames only, of course.
Chombi
Chombi
