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  1. #1
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    Shimano Road/Mountain square compatibility

    Hi All!
    Whether standards of tapered square for mountain and road groups are compatible? Can I set road Shimano 105 Crancs ( FC-1056) at mountain UN73 bottom bracket?
    Sincerelly yours Oxygen H.

  2. #2
    * vpiuva's Avatar
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    Yes, but the chainline may be an issue. The tapers are the same, however.

  3. #3
    Elitist Troglodyte DMF's Avatar
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    The tapers are the same, but if it's the bottom bracket that you used with your old crank set, the axle is probably the wrong length.
    Stupidity got us into this mess - why can't it get us out?

    - Will Rogers

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