E*thirteen Helix Race 12sp Cassette FW2HRA-123

- Work flawlessly with Shimano and SRAM (non-Transmission) 12sp shifters, regardless of different cog spacing and chain behavior\n- Improved reliability of a steel and aluminum assembly \n- Intergalactic PVD finishing is twice as durable as anodized models\n- 9-50t offering provides a 556% range \n- 9-52t offering provides a 578% range\n- Special note for Hope hub owners: Hope XD drivers do not adhere to SRAM XD specification and require an additional shim. Shims can be acquired from E*thirteen