The good folks at Stan's NoTubes make it easy to convert your rear wheel to the new SRAM XX1 11-speed group with the Stans XD XX1 Freehub for a fraction of the cost of a new wheelset. Just pop off your 10-speed freehub body and install the XD XX1. Stan's even included the drive side end cap for your particular axle.

The Stan's NoTubes XD XX1 Freehub is available in four sizes–135/10mm, 135/12mm, 135/9mm, and 142/12mm.