This kit includes end caps, threaded axle, bolts and washers, allowing you to convert your thru-axle or quick release E-sync, Neo, or Neo Ultimate rear hub to a 10x135mm bolt-on system. Bolt-on axles are recommended to prevent slipping and wheel misalignment in frames with horizontal drop-outs. Maximum bolt torque: 35Nm. Compatible with E-sync, Neo, and Neo Ultimate 12x142mm rear hubs. Compatible with frames with traditional, quick-release-compatible dropouts. Not compatible with any 148mm hub. Not compatible with Centerlock hubs. Not compatible with frames designed for thru-axles. Not compatible with M-pulse hubs.Technology:E-sync:- 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.