Bicycle Mechanics - Switching Cassettes
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08-27-07, 08:35 PM
I have a 12-25 10 speed Ultegra cass. on my road bike, and need another cassette to use for the trainer wheel I recently picked up. If I buy a 12-27, will I need to put on a longer chain, or is the 2 tooth difference so minor that it won't really matter?
08-27-07, 08:49 PM
Probably not, but it depends on how short your chain is now. It also depends on how many miles the 12-25 has on it. Old chains and new cassettes don't like each other most of the time.
Heck, get something really different. Like 11-23. You might like it, especially with a triple.
i went from a 14-28 to an 11-34 on my seven speed and no problems with the chain
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