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  • How does that work? Looks like a GXP crank, the chainline is controlled by the NDS bearing location.

    Err... it is gxp... did I do a bad thing?

    The chainring is mounted on the inside position and the bolts were rubbing on the chainstay so I wanted to move the driveside cranks outboard a fraction. I just found a random spacer in my toolbox, took the driveside bearing out and popped the spacer in before reassembling.

    In the picture I added the spacer where I have drawn the green ring... is this wrong?


    1 Attachment

    • spacer.jpg
  • is this wrong?

    Yes, because the NDS bearing is supposed to be captured between the shoulder on the axle and the NDS crank. If you add the spacer, the NDS crank will try to pull the DS crank through the DS bearing, because the shoulder won't have reached the NDS bearing to stop it. Either the BB will bind up because the DS crank is hitting the DS cup, or if you loosen the NDS crank bolt to relieve the binding, the NDS crank won't be far enough onto the spline and it will be damaged by pedalling torque.

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