Compact Crank
Can 9-speed shimano ultegra cassette be used with 10 speed dérailleur?
I need a new cassette, and there are lots of good deals on the CS-6500 9 speed ultegra stuff. Right now I have CS-6600 ultegra components with a compact crank. Can I just switch out just the cassette? I don't mind losing a gear, and its like half the price of the 10 speed ultegra stuff. will the brifters and derailleur and chain work? or maybe Id have to get a 9 speed chain also?
yes, but you'll need a 9-speed shift lever also.
In the end... it's cheaper just to buy a 10-speed cassette. If money is that tight, get a Shimano 105 level 10-speed cassette
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