Since the appearance of the Shimano XTR M9100 12 Speed groupset. a new 12-speed freehub appears on the market soon. 


DT Swiss partnered with Shimano and launched a new 12-speed XTR freehub called “Micro Spline”. Micro spline freehubs are required to run the new Shimano M9100 series cassettes.

•10-51 12-speed Wide Range

•10-45 12-speed Rhythm Step

•10-45 11-speed lightweight spec

The traditional Shimano HG freehub is equipped with 13 freehub splines. However, Micro Spline features 23 splines, helping to improve the load distribution.

The Micro Spline freehub is slightly shorter than the HG freehub body so it can accommodate a smaller 10t cog. The 10t cog is connected to the 12t cog and positioned outboard of the freehub body. 

Like SRAM XD freehub, the new Micro Spline freehub still requires a special end cap to compatible 12mm thru-axle. The new freehub design still uses a traditional lock ring structure. just reduction the size Compared to the XD freehub, the Micro Spline freehub is designed to be closer to the traditional 9/10/11S HD freehub.

All of our DT Swiss 240 and 350 mountain hubs carbon mountain bike wheels are available with the new Micro Spline freehub! 


Sram XD-R is an XD style freehub which is 1.8mm wider compared to the original XD freehub. Sram plans to build 12-speed road cassettes so they planned this freehub design out in advance. Mountain bike cassettes (ie. XG-1180, XG-1150) will fit onto XD-R freehubs but will require a 1.8mm spacer.

DT SWISS hub with XD-R freehub is not available yet but will come soon. Pls contact us if you want to order!