Shimano long cage with smaller cassette?
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  1. #1
    RoadBikeReview Member
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    Shimano long cage with smaller cassette?

    I have a 'climbing bike' set up with a long cage Ultegra (RD-R8000-GS) and 11-34 cassette (52/36 crankset). Shimano lists a "low sprocket" range of 28-34t for that RD. Why spec a low sprocket min? From what I've understood, a long cage RD should be able to handle shifting a smaller cassette (assuming proper chain length for that setup). Does Shimano think the world will end if I use an RD-R8000-GS with a 12-25 ?

  2. #2
    Cleavage Of The Tetons
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    That will be just fine, adjust the b-tension screw, and you are good to go.

  3. #3
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    Quote Originally Posted by rideit View Post
    That will be just fine, adjust the b-tension screw, and you are good to go.
    Yup. Not an issue.

  4. #4
    'brifter' is a lame word.
    Reputation: cxwrench's Avatar
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    Just in case you were still wondering it will be fine.
    I work for some bike racers
    I've got some bikes, some guns,
    and a bunch of skateboards

  5. #5
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    Thanks for the replies. Older Shimano RD specs would list capacity, largest sprocket, and smallest sprocket, but this was the first time I noticed a "min large sprocket" spec.
    I need to stop reading Shimano tech docs

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