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  1. #1
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    early 90's rockhopper BB shell diameter?

    Can anyone guess the shell diameter for an early Rockhopper? The BB is shot and I'll have to take it to a shop to have it removed. I have a 68mm square taper I could install myself for a replacement, assuming it would fit.

    Anyone? Thanks.

  2. #2
    Senior Member z415's Avatar
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    You can measure it with almost any measuring device as the sizes are either going to be 68 or 73. If you really just want to take a shot at it, you can always do 73 and get a spacer. Probably not the best, but will work.
    Falling is learning...[SIGPIC][/SIGPIC]...learn to not fall in a box.
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  3. #3
    I have senior moments... bikinfool's Avatar
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    Sounds like you want bb shell width. While the shell width is likely 68 or 73mm (just measure it with a ruler), the diameter is 1.37" and it's English threaded almost certainly...
    suum quique
    Mountain bikes: Santa Cruz Hecklers (99, 02, 07), Santa Cruz Nomad, Moots YBB, Trek OCLV Pro Issue, American Breezer
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  4. #4
    Pleasurable Pain greyghost_6's Avatar
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    +1 use a caliper.
    I had to re-learn how to walk once, but never needed to re-learn how to ride a bike. Cyclist for life.

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