Jump to XD, HG, Microspline and XDr freehub bodies.
When replacing driver bodies, make sure the one you get is compatible with your hub model. For example, Industry Nine Hydra and 1/1 hubs use different freehub bodies.
Similarly, the freehub body for DT Swiss’ star ratchet (used on DT180, 240, 350 and newer 370 hubs) is incompatible with the driver used for the three-pawl hub used on older DT370 models.
XD: Used on SRAM GX, XO and XX groups
Features:
- Intended for mountain applications
- Utilizes a threaded interface
- Lockring is integrated into the cassette
- One-piece design (no individual cogs to stack or slide on)
HG: Used on SRAM NX or Shimano 11/12 speed road cassettes
Features:
- More commonly used for Shimano road drivetrains (HG-EV) and entry level SRAM mountain cassettes
- Can't go smaller than 11 tooth cog
- Cogs have to be individually installed or slid on
- Sometimes referred to as a 'splined' driver body
- Interface has 13 splines
Microspline (MS): Shimano 12 speed mountain groups
Features:
- Intended for Shimano's 12 speed mountain cassettes
- Slides on like HG, but can accommodate a smaller 10 tooth cog
- Interface has 23 splines
XDr: SRAM 12-speed road groups
Features:
- Similar to XD but intended for road applications
- Designed to accommodate 12 speed road cassettes
- Compatible with XD mountain cassettes with the use of a 1.85mm spacer behind the cassette
Still confused? Hit up our legendary Rider Support team.