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How to move 6 speed(126mm rear) to a 8/9 Speed(130mm rear)?(8 posts)

How to move 6 speed(126mm rear) to a 8/9 Speed(130mm rear)?zmarke
Nov 22, 2002 3:19 PM
My brother has an old Cannondale with 6 speed Shimano 600 parts with downtube shifters. The bike was purchased in 1988 and he used it for about 6 weeks that summer. It has been sitting unused for 14 years since it is way too small. He wants to spend as little as possible and transfer the parts to a new frame.

Cannondale's frame exchange program is a joke since it costs about as much as an entirely new bike.

Since all the parts from the 1988 will fit a newer Cannondale frame (I called Cannondale to check) and they are availible on ebay for about $100, my question is...

What would need to be done to the rear wheel since it is currently spaced at 126 and any new frame is 130? Longer Axle? Redish the wheel?

Any other issues you can think of?

re: How to move 6 speed(126mm rear) to a 8/9 Speed(130mm rear)?Juanmoretime
Nov 22, 2002 3:50 PM
Possible redish and some metric washers on the axles to make up the spacing differences.
re: How to move 6 speed(126mm rear) to a 8/9 Speed(130mm rear)?eddie m
Nov 22, 2002 3:53 PM
Add a 2mm spacer on both sides of the wheel and you won't need to re-dish. You may or may not need a longer axle, or even a new quick release.
You WILL need to redish and add spacersKerry
Nov 22, 2002 4:21 PM
The 8/9 speed cog set is wider than the old 6 speed, and so the spacers will have to go mostly on the cog side and the wheel will have to be dished further. Probably will need a longer axle as well, but that depends on how long the original axle was.
I suspect the shifters are going to give you more trouble.Spoke Wrench
Nov 22, 2002 8:18 PM
Your 6 speed bike probably had down tube shifters. A new frame is probably going to be set up for STIs with just cable stops, and not shifter bosses, on the down tube.
an ideaDaveG
Nov 23, 2002 4:45 AM
I think it can be done with some spacers and re-dishing of the wheel. A decent shop can handle it. However, you are still going to end up with a bike with usable but obsolete parts. My thought would be sell the complete bike, and use the cash towards a new bike. Ultimately that may not be much more expensive than buying and new frame and tranferring your parts and you'll have something a bit more modern. Good luck
Yup. He didn't ask, but that's what I'd do too. (nm)Spoke Wrench
Nov 23, 2002 5:42 AM
Cheap City Bikezmarke
Nov 26, 2002 7:14 AM
It is not worth the money for a new bike.

For about $125 for the frame with downtube shifter studs and about $100 to move the parts and re-dish the wheel he will have a aluminum frame (no rust) with Shimano 600 parts that were only used for a few weeks.

Is it still worth looking at a new hybrid or road compalete bike in the $225 range? Won't the parts wear out faster than the Shimano 600 stuff?