This 1.8mm cassette spacer is compatible with all E-sync freehubs designed for SRAM XDR and Shimano HG cassettes. Not compatible with Shimano Micro Spline freehubs.
E-sync hubs are built to last, including under the higher torque and weight of eBikes. A 6066 alloy shell, heat-treated steel ratchet ring, reinforced pawls, and full Enduro bearings rovide brute strength, while 8.18° engagement provides the speed.
