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  1. #1
    Goes to 11. striknein's Avatar
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    Crank and bottom bracket not compatible (not what you might think). Options?

    I've got a Shimano FC-1056 crankset that I intended to use on my Peugeot UO-9 conversion. I purchased a threadless bottom bracket from Velo-Orange with a 107mm spindle (correct length as per Shimano), and due to the extra thickness of the BB cups, when I torque down the crank arms the bottom bracket binds. It seems the inside of the bottom bracket cups are pressing on the bearings when the crank arms are properly torqued.

    Is it safe to grind the back of the crank arms for more clearance?

  2. #2
    Senior Member
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    too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
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    Within reason, shaving a bit off the arm won't be an issue. But use a file. When you grind aluminum it tends to get hot and load up the wheel very quickly.
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    An ounce of diagnosis is worth a pound of cure.

    “Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

    “One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

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