I have one bike with Dura Ace 10, and one with Ultegra 10. I would like to get an alternate cassette for each (with a 23 or 25) and want to know if I need to buy two different ones, or if I can buy one of either type and use it on both bikes.
Yes
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To clarify SAC’s answer, yes you can use an Ultegra 10 cassette with Dura Ace and vice versa. So just need to buy one alternative cassette.
Thanks for the fast response!
You’re right, I should have written “Yes and vice-versa”
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Yes…
…you can even use 9 speed cassettes with a 10-speed system AS LONG AS YOU HAVE A 10-SPEED CHAIN…that’s all you need the chain…so if you don’t mind missing out a gear get an even cheaper 9-speed cassette