e*thirteen Helix R 12-Speed Cassette

The e*thirteen Helix R 12‑speed cassette offers a two‑cluster design for MTB and gravel bikes, compatible with SRAM XD freehubs. It features steel and aluminium sprockets, a durable PVD finish, and interchangeable large pins for easy wear replacement.

The e*thirteen Helix R cassette is built for mountain and gravel bicycles, providing a 12‑speed range through a two‑cluster configuration. Its sprockets combine steel (SCM445) for the inner pins and aluminium (7075‑T651) for the outer pins, both treated with a PVD finish for durability. The design permits the replacement of the larger aluminium sprockets independently, extending component life. Compatibility is limited to SRAM XD freehubs, supporting standard 12‑speed drivetrains from Shimano or SRAM. Gear options include a 9‑45 t range suited to gravel riding and a 13‑52 t range aimed at alpine terrain, offering a wide ratio spread while allowing the use of smaller chainrings. The optimized interface between the two clusters enhances shifting performance, making the cassette a practical choice for riders seeking versatility across cross‑country, all‑mountain, and enduro applications.