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  1. #1
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    Crank arm question

    is it normal to have a couple of mil difference in the gap between the end of each left and right crank arms and each stay.

    thanks





    Crank arm question-photo-25-09-2013-19-18-02.jpg

  2. #2
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    Quote Originally Posted by moneycash View Post
    is it normal to have a couple of mil difference in the gap between the end of each left and right crank arms and each stay.

    thanks





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    Some bikes that I have built for people can have a strange "chain line" and it is difficult to get the bike shifting correctly at both ends of the cassette and ft rings with out offsetting the crank alittle to one side or another . ( Some wheels are not dished , some are , some rear sections are not straight with the ft triangle and so on )

    Also some bikes have a different rt side chain stay that is slightly bigger and stronger to deal with pedaling forces and it will have a different clearance because of this.

    But generally this is not the case,..... and you can center them up yourself and you are good to go .
    Its not uncommon to see production built bikes that are off alittle , just because nobody cared when assembling the bike

  3. #3
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    Hi, so the crank arms are spaced by washers on the BB is that correct?

    To move the crank arm 2mm out on the drive side I put a 2mm washer between the BB shell and the frame?

    Is that correct? Thanks

  4. #4
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    Quote Originally Posted by moneycash View Post
    Hi, so the crank arms are spaced by washers on the BB is that correct?

    To move the crank arm 2mm out on the drive side I put a 2mm washer between the BB shell and the frame?

    Is that correct? Thanks
    That is where I would start yes.
    But first make sure the bikes shifts really well in all the gears and there are no problem .
    Then when you are done if you have a goofy shifting problem , you might have to go back ........just saying .....

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