Originally Posted by comoto
Why not? If you adjust the stop right for the 9th gear the shifter will never go past 9.
yea it won't, but it's like not using one gear of a 10 speed cassette. The OP basically asks if a 9 speed cassette can be used with 10 speed shifters. The answer to that is "no", because the spacing is different (Curt Kurt gave the numbers above). 10 speed and 9 speed cassettes are the same width, and it actually has nothing to do with adjusting the stops.
edit: I thought again, and actually it may be possible. The chain will be about 1 mm off at each end of the cassette if the derailleur is adjusted perfectly for the middle cog, which will cause some rubbing and noise.
Last edited by erhan; 08-20-07 at 09:09 AM.