Shim Dura Ace non-drive side crank
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  1. #1
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    Shim Dura Ace non-drive side crank

    Is it feasible to shim the non drive side crank out a mm or 2? Have a 4iiii power meter from another bike I want to put on new Trek Domane and the left side pod kisses the down tube. I realize there is a stopper pin there but I believe it can still move some. Any ill effect from doing this? I realize my Q factor will change but not concerned with that. Do not want to do anything to hurt bottom bracket.

  2. #2
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    Not a good idea. You want full engagement w/ the crank axle. You want the stopper pin doing it's job. You won't hurt the bottom bracket but you're more likely to screw up the NDS crank arm...and/or crash.
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  3. #3
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    If I can gain enough clearance with stopper still engaged would that be okay?

  4. #4
    'brifter' is a lame word.
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    I would not shim a Shimano Hollowtech crank ever. Sorry, but that's one thing I won't mess with. How much room do you need to get the power meter to clear?
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  5. #5
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    Quote Originally Posted by cxwrench View Post
    I would not shim a Shimano Hollowtech crank ever. Sorry, but that's one thing I won't mess with. How much room do you need to get the power meter to clear?
    +1 on that. Never, ever. The pinch bolt would move out on the spindle creating a force that was never intended. You could put too much pressure on the end of the spindle and potentially ruin not just the left arm, but the whole crankset.

  6. #6
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    Quote Originally Posted by cxwrench View Post
    I would not shim a Shimano Hollowtech crank ever. Sorry, but that's one thing I won't mess with. How much room do you need to get the power meter to clear?
    It is just kissing it. Realistically probably need 2mm. Will take your advice and not do it. I can buy another left crank fairly cheap and have another pod installed or just use the right side.
    Thanks for your help.

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