e*thirteen components

Helix Race 9-50t 12-Speed Cassette

What Our Gearhead® Experts Are Saying:

"I wanted the wide 9–50t range but didn’t want to be locked into a single drivetrain brand. The Helix R gave me SRAM-level range with lighter weight—and I could still run my Shimano derailleur. Shifts are snappy, and swapping between freehubs is a breeze with the replaceable parts."

For the riders who demand versatility without compromise, we count on the Helix R 12-Speed Cassette from e*thirteen. Engineered to work with both SRAM and Shimano 12-speed drivetrains, this cassette gives us the freedom to build our drivetrain the way we want—without being boxed into a single ecosystem.

With a massive 9–50t range, the Helix R offers all the gearing we need for grinding steep climbs and hammering flowy descents. The two-piece design keeps weight impressively low while letting us replace only the worn sections, saving money and minimizing waste. Hardened steel cogs and aluminum carriers strike the right balance of durability and weight savings, making the Helix R ideal for enduro laps, big backcountry days, or building the dream trail machine