• Use the same brand of rotors on both sets. If the hubs put the rotor at different offsets, that's 2 secs with a 5mm allen key, assuming it's a postmount caliper.

  • Or you can shim them in to the correct position, assuming they are six bolt. And you don't need negative shims :)

    I had this problem with XC race wheels on what is now Branwen's Cannondale - it was actually a real pita because the hope and old cannondale hubs put the rotors in such a different place that you couldn't even get the wheel in if you tried a direct swap. Ended up shimming the shit out of the cannondale hubs.

    The calipers were direct mount IS, so no, no adjusting in five seconds there.

  • All these problems that I'm only hearing about after he sells me the bike!

    Sounds like a case for new wheels at the least

  • Surely shimming the rotors can only correct for a lateral offset from the hub centre rather than a difference in rotor thickness.

  • My main wheelset is centrelock, which are thinner and with a 'lower chainline' than the thick rotor 6 bolt set. Not sure centrelock shims are a good idea and I'm struggling to find negative shims for my 6 bolt hubs ;)

    Seems less effort to just swap tyres over when I need them

  • That reminds me... Got some chubby wheels to fit GF's Fatbike last summer and I should shim the rotors on whichever set of wheels has least offset.

    Never seen a shim for centrelock though.

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