Fits all SRAM XD and XDR 12 Speed Road and Mountain Cassettes Features: - Made from 6/4 titanium - Compatible with either 24T or 48T engagement systems Freehub bodies come with: - 2 bearings installed - 3 pawl springs - Pawls not included - Use your old pawls unless damaged - 1.8mm cassette spacer included on XD/XDR drivers only - Spacers available separately for Shimano HG 11 and HG 10 - Not compatible with other brands of hubs