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  1. #1
    mtbr member
    Join Date
    Sep 2013

    GT Team Marathon - 2x10?

    Hello, can I convert my 3x9 system on my GT Team Marathon to a 2x10? My main question I guess is what determines if a rear wheel / rear frame dropouts can accept the width of a 10x? The rear of my bike is 135mm.....can 10x fit? I currently have Crossmax SLR with a 9x on them....can 10x fit on them? I plan to sell the Crossmax and replace with CrankBrother Cobalts 3's....will a 10x fit on them? Sorry, just not too sure what determines what. Thanks! Blake

  2. #2
    mtbr member
    Join Date
    Dec 2011
    Yes, a 10 speed cassette will fit your mavics as well as the cobalt 3's as long as the have a 8/9/10 speed cassette body. You will need a 10 speed chain as well.

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