E*thirteen Helix Plus 12sp Cassette 9-50t - Black MFPN=RF735-GKSS-P-B2 The best choice for XCM

The best choice for XCM courses where terrains can vary but speed is fundamental

and unmatched power transfer to the ski

Interchanging front and rear rims is possible

} Redesigned head on a Taperwall aluminum mast

Uses same clamp/braze-on adaptor as 10-speed

E*thirteen Helix Plus 12sp Cassette 9-50t - Black MFPN=RF735-GKSS-P-B2 The best choice for XCMEngineered 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