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  1. #1
    Goes to 11. striknein's Avatar
    Join Date
    Oct 2010
    Wichita, KS, USA
    My Bikes
    2015 Soma Double Cross
    3 Post(s)
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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
    Join Date
    Apr 2009
    New Rochelle, NY
    My Bikes
    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
    152 Post(s)
    1 Thread(s)
    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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