Join Date: Dec 2004
Location: Middle of da Mitten
Bikes: Trek 7500, RANS V-Rex, Optima Baron, Velokraft NoCom, M-5 Carbon Highracer, homebuilt recumbent
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Maybe, maybe not. Sorry I didn't pick up on it the first time, but if you try to use 8-speed bar ends with a 9-speed cassette, you're asking for trouble.
SRAM cassettes are 'shimano compatible' meaning they have the same spacing between gears: 4.8mm for 8 speed and 4.34 mm for 9-speed. If you use 8-speed shifters on a 9-speed cassette, they won't index correctly, and of course you'd have one more gear than clicks - although sometimes bar-ends will have an extra click.
IF you had the extra click and made gear #5 the one that detents best, then you'd be off about 1.9mm at 1st and 9th. While it *might* work, it'd be almost a half gear off, so it'd work crappy at best.
The chain and crankset wouldn't matter enough to worry about. And obviously if you can get 9-speed bar-ends to go with a 9-speed cassette, there's no problem.