White Industries XMR Hub - RearTHE XMR The XMR has been our work horse hubset the last few years taking beatings in everything from the Enduro World Series to every day riding. Despite what we put the XMR through it has been a solid point in our line of hubs giving you strong stiff wheels while still being adaptable to different bikes and drivetrains. The six bolt disc is a tried and true braking system, but in no way means this hub is living in the past. The XMR is adaptable to