Features: XD driver that works with Saris H3, CycleOps Hammer, and H2 trainers SRAM XD compatible with cassette adapter included SRAM XDR compatible without spacer For use with SRAM RED and Force eTap AXS(TM) 12 speed groups on Saris direct drive trainers Well-made freehub body is easy to install Lubrication is recommended prior to installation for optimal performance Made in the USA