Sram XD

SRAM XD freehubs were developed by SRAM mountain bike cassettes, specifically enabling the use of a smaller 10-tooth cog. This allows for a wider gear range, especially with 1x drivetrains. It is compatible with 11 and 12-speed cassettes. The XD driver body maintains the same hub spacing and bearing locations as previous Hyperglide freehub bodies, making it compatible with existing hub designs.