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  1. #1
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    Shimano 11-23 to 12-25

    I just bought a set of SRAM s80's for my tri bike....I'd like to keep my stock wheels on for training and switch out the s80's for racing. To make the change simple, I am going to buy a new cassette to put on the s80 rear. My current cassette is 11-23. Is there a problem w/ buying a 12-25 for the s80, or should I stick w/ buying another 11-23? Are there advantages with a 12-25?

  2. #2
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    if anything you should put a 12-25 for training and a 12-23 for racing. with a 12-25 you should be able to climb higher hills easier, so for triathlon..........no.

  3. #3
    Senior Member Barchettaman's Avatar
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    No tech reason why the 12-25 won´t work.
    As for advantages/disadvantages..... erm, depends on the course! I train in a hilly area so have a MTB 11-28 cassette.
    Are you running compact cranks?

  4. #4
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    Yes, I have compact double crank.....Shimano Ultegra 39/53.

  5. #5
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    that's not a compact...

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