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12-25t cassette with long arm mech

feelgoodlostfeelgoodlost Posts: 129
edited November 2013 in Workshop
As the title suggests.... I want to swap the masssssive 32t cassette that's just came with my new road bike. It's got a 105 long cage derailleur and I just wanted to know whether there'd be any problems using the 25t cassette with it?

Apologies in advance if I'm being a bit thick with this one :?


  • mister pmister p Posts: 405
    No problems, it will work fine.
  • taon24taon24 Posts: 185
    You may be able to reduce the chain length if you wish, although it is not as important as increasing chain length if you go back to the 32 cassette.
  • keef66keef66 Posts: 13,123
    I run a 105 triple with a 12-25 cassette and long rear mech, so it will definitely work with a double.

    As above, you should shorten the chain.
  • Thanks for the replies.

    I've went ahead and ordered a 12-27t for now. I'll see how that feels and will know for future reference that I can always go lower if needs be :)
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