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  1. #1
    mtbr member
    Join Date
    Apr 2009

    Caution;  Merge;  Workers Ahead! BB compatability with 09 SJ Comp 29er and Surly KM?

    Hi all,

    I'm doing an even swap with someone, trading them my 2009 Spec SJ Comp 29er frame for their 2009 Surly KM frame and fork.

    Will my Spec SJ bottom bracket fit into the new KM frame?

    Its a Shimano FC-M542 Hollow Bottom Bracket, no other information available unfortunately.

    It looks like the only things I will need to purchase are a FD shim and a new seatpost and seatpost clamp, but everything else will swap over perfectly.

    Thanks for your help.

  2. #2
    mtbr member
    Join Date
    Dec 2010
    Yes it will fit fine, its a standard shimano external BB. Not sure how many shims the Specialized should/will have (between bb cup and frame) but the KM will only need one, on the driveside cup.

  3. #3
    mtbr member
    Join Date
    Apr 2009
    Excellent, just the info I needed.

    Thanks much @dickyelsdon

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