# XD-R — Bike drivetrain and groupset compatibility

For XD-R, manufacturer is SRAM; component type is freehub; speeds is 12; pairs with is mountain cassettes; condition is 1.85mm spacer, recorded from its source on 2026-08-11.

- **Manufacturer:** SRAM _(our reading, not quoted from the source)_
- **Component:** XD-R _(verified: appears in the quote below)_
- **Component type:** freehub _(our reading, not quoted from the source)_
- **Speeds:** 12 _(our reading, not quoted from the source)_
- **Pairs with:** mountain cassettes _(verified: appears in the quote below)_
- **Condition:** 1.85mm spacer _(verified: appears in the quote below)_

## What the source says

> The road version (XD-R) is compatible with mountain cassettes if you add a 1.85mm spacer. There is no spacer required with a road XDR cassette.

## Source

- https://www.lightbicycle.com/newsletter/Bike-Freehub-Cassette-Compatibility-Manual.html

Last verified: 2026-08-11. Review by: 2027-08-11.
Part of [Bike drivetrain and groupset compatibility](https://referencesource.org/bike-drivetrain-groupset-compatibility/).