Saris (9728T) XD/XDR Hammer/H2 Direct Drive Freehub

XD driver that works with Saris H3, and CycleOps Hammer & H2 trainers.

• SRAM XD compatible with cassette adapter included
• SRAM XDR compatible without spacer
• Works with Hammer, H2 and H3 trainers
• 12-speed systems cannot be used with the H3 Direct Drive Smart Trainer, as well as the CycleOps Hammer and H2.