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  1. #1
    mtbr member
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    Mar 2008
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    Bontrager XR1, XDX, Revolt Super X

    Anybody race on these? Have you put calipers on them to get their true width's? Which one seems to roll fastest for you on hardpack?

  2. #2
    mtbr member
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    Apr 2008
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    I don't have any racing experience yet, but I mounted up an XDX 2.1 on the rear and jones xr 2.25 on the front both tubeless ready on my hardtail.

    I haven't measured them, but I can say that the volume on the XDX is huge! Its a really big volume tire and is just as big, if not slightly bigger than the 2.25 jones on the front, which has nice volume.

    I really love both of these tires and traction for me has gone through the roof. Take that with a grain of salt though because this is the first set of tires I've run tubeless. I'm 170 geared and run 26/26 psi. The XDX rolls really fast and hardpack and has good traction on hardpack and roots, its quite comfortable too. Its actually not too bad in the wet either, but I've not tried them in real mud.

    Fantastic tires.

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