Bicycle Mechanics - Replacing 9-speed cassette w/10 speed

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cmh
05-29-07, 02:52 PM
I have a TT bike with 9 speed shimano cassette and friction shifters. Can I pull the 9 speed cassette and put a 10 speed on (it already has a 10 speed chain)? Will the wheel dish/hub spacing be correct? Any other changes/adjustments neccessary? The wheel is a Mavic Aksium if that is of any consequence.

Thanks for the help.

Proximo
05-29-07, 03:20 PM
Sounds like it should work. I believe the 9sp and 10sp cassettes are the same width, the cogs are just thinner on the 10sp to squeeze in the extra gear.
cmh
05-29-07, 03:29 PM
Sounds like it should work. I believe the 9sp and 10sp cassettes are the same width, the cogs are just thinner on the 10sp to squeeze in the extra gear.

Thanks - I'll give it a shot. It sounds like I might not need any adjustments. At worst, I'd have to adjust the derailluer stops.

cmh

ChezJfrey
05-29-07, 03:42 PM
I've done this with STI and it works fine - friction should be even easier. You should have a thin spacer that came with the 10sp cassette for use with a 9sp freehub. I had to adjust my rear derailleur limits to obviously omit one gear, but you will likely be able to hit all 10.