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e*thirteen has expanded the drive options for every rider with our original Helix Race 9-50T cassette with a 533% gear range. Our patented 9t sprocket and patented two-piece design gave riders an unprecedented ability to build the drivetrain of their choice. Now we've built on that winning formula and added a 52T sprocket, delivering a staggering 578% overall range.

Love to climb? Put on a 28T chainring and go. Want maximum speed? Put on the big derailleur and rest assured you've got the biggest gear range you can get in a single-speed 12-speed. The Helix Race 9-52T cassette offers the largest gear range in the galaxy, cross compatibility with Shimano, SRAM and TRP derailleurs and chains, and a two-piece forged/machined design for easy installation and service.

1. Largest gear range: 578%.
2. Cross-compatibility: works with Shimano, SRAM and TRP derailleurs and chains.
3. Two-piece forged/machined construction.
4. Low service cost: Replaceable aluminum and steel clusters.
5. Lightweight and clearance: Unique high 9T gearing allows the use of smaller chain rings.

Specifications:

Fit: XD™ and XDR™
Material: 2 aluminum gears, 10 steel gears.
Range: 578%
Size: 9-52T: 9, 11, 13, 15, 17, 20, 23, 27, 31, 36, 43, 52
Number of pinions: 12
Weight: 404 g