CHRIS KING MICRO SPLINE CONVERSION KITCONVERTING OVERMicro Spline is the newest type of cassette from Shimano. If you convert your hub to work with Micro Spline, you'll be able to use Shimano's 12-speed cassettes. The Chris King Micro Spline Conversion Kit converts your 12 x 148mm ISO B rear hub to a Shimano Micro Spline compatible driveshell. It is available with either stainless steel bearings or ceramic bearings if you're looking for higher performance. Features Compatible with Micro Spline cassettes like XTR, XT, and SLXConverts the ISO B rear hub with 12 x 148mm spacing Available in either stainless steel bearings or ceramic bearings | Chris King | Micro Spline Conversion Kit | Silver | 12X148, Ceramic