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Convert your existing Chris King mountain hub to HG, XD or Micro Spline with a new drivesheel drivetrain.Features:- Compatible with all ISO or Centerlock mountain rear hubs with dual bearing axles.- Installation requires a T10 Torx wrench and a Park Tool FR-1.3 (or equivalent)- See the Boost Centerlock service video for instructions on installing and removing the Driveshell driveshell.- If you have an ISO hub with a needle bearing shaft and drive, check out our dual bearing conversion kits.