Cassette gearing and chain length

Discuss light weight issues concerning road bikes & parts.
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by tinchy

My caad10 is currently set up with a 25/12 cassette. I have another spare wheel at Uni but it has a 26/11 cassette. My question is is it ok to simply swap the 26/11 for the 25/12 or does the chain length need to be adjusted? Thanks

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by Svetty

Difference in optimum chain length won't be enough be be an issue here. A wider variation in the lowest gear might be.

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