This pair of front end caps is designed to fit 6-bolt E-sync OS and Neo OS hubs when used with older, traditional 20mm axles found mostly on DH forks prior to 2019. The end caps feature a low-friction U-cup seal that snaps into place and stays secure even when your wheel is removed from your bike. More information about the difference between 20mm and 20mm Boost here. Not compatible with Centerlock or non-OS hubs. Not compatible with M-pulse hubs.
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.
