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Thread: Cage Length?

  1. #1
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    Cage Length?

    What is the difference between short, medium, and long rear derailleur cages? If I'm looking to upgrade which should I go with?

  2. #2
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  3. #3
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    Thanks

  4. #4
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    The shorter you can get away with requires less chain. It will have a bit less chain slack and can reduce chain slap on your chainstays. It may even reduce throwing your chain. Which you can run will depend on how many teeth you will span. I believe the calculation is (Biggest chainring - Smallest chainring) + (Biggest cog - Smallest cog)=? .

    Example 3x9 settup with a 44 ring and 22 ring and a 11-34 cassette.

    (44-22) + (34-11)= (22) + (23)= 45t

    Sram and Shimano have different specs of chain wrap for their derailleurs. You would have to check with them specifically about their limits.

    I think general rule of thumb is 1x9= small cage, 2x9= medium, 3x9= long. At least until the new XX1 system is released.

  5. #5
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    Thanks that makes it a little easier to understand.

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