E*thirteen Helix Plus 12sp Cassette 9-50t - Black CheckoutSpec= Cable with 4 digit combination lock Live Valve integrates seamlessly with

Live Valve integrates seamlessly with the Giant/Yamaha drive system

Material:   6061 T6 aluminum

we do not recommend using the Wolf Tooth Valais or similar products that limit the downward (retracting) travel of the post

Material:  6061-T6 aluminum brackets

but use a different axle and ratchet to lower the cost

E*thirteen Helix Plus 12sp Cassette 9-50t - Black CheckoutSpec= Cable with 4 digit combination lock Live Valve integrates seamlessly withEngineered for E bike durability Work flawlessly with Shimano and SRAM (non Transmission) 12sp drivetrains, regardless of different cog spacing and chain behavior Improved reliability of a steel and aluminum assembly Offering a 556% range utilizing an XD driver to enable a 9 50t, 12sp cassette Special note for Hope hub owners: Hope XD drivers do not adhere to the XD specification and require an additional shim. Shims can be acquired from E*Thirteen