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  1. #1
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    Frankenbike just needs crank, have BB

    I'm looking at an Alivio crank for my Frankenbike. It's the last piece I need to finish this little project which has blended a mountain frame with 700c wheels and cross style tires.

    The crank calls for a 113mm BB, but I just happen to have a 118mm BB. Is there any reason I couldn't run these together? I'm thinking I'll just have to adjust the FD stops out further to compensate. Am I right?

    Thanks all.

  2. #2
    Elitist Troglodyte DMF's Avatar
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    Yeah, you could do it, although the chain line will be off. Is this a geared bike?

    You should do a complete reset on the FD every time you change cranksets.
    Stupidity got us into this mess - why can't it get us out?

    - Will Rogers

  3. #3
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    Quote Originally Posted by DMF View Post
    Yeah, you could do it, although the chain line will be off. Is this a geared bike?

    You should do a complete reset on the FD every time you change cranksets.

    Yes, it will be a geared bike. Though I had considered dropping the small ring from the crank and making it a double. I don't think I'll need that ring very often.

  4. #4
    Elitist Troglodyte DMF's Avatar
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    I'd recommend keeping the ring on. When you need it you really need it.

    Try mounting the crank and measure the chain line (see Sheldon for how). Then compare to rear chain line - they should be the same. (also check chainstay clearance)

    Chain line mismatch can result in degraded shifting and increased chain wear.
    Stupidity got us into this mess - why can't it get us out?

    - Will Rogers

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