E*Thirteen Helix Race 12-Speed 9-52T Cassette

E Thirteen expanded drivetrain possibilities for every rider with their original 9-50T Helix Race Cassette with 533% gear range. E Thirteen's proprietary 9T sprocket and patented two-piece construction gave riders an unprecedented ability to build the drivetrain of their choice.

Now, they've built on that winning formula and added a 52T sprocket for an eye-watering 578% total range.

Love to grind climbs? Throw on a 28T chainring and go pull some stumps. Hungry for top speed? Push a big ring, comfortable in the knowledge that you've got the most gear range you can get from a single-ring, 12-speed setup.

Features:

• Widest range in the galaxy at 578%
• Compatible with SRAM®, Shimano®, and TRP® Shifters and Derailleurs of the same gearing count and similar cage capacity
• 2-piece forged/machined design provides ease of assembly/service and reduces waste
• Aluminum and Steel clusters can be replaced separately to reduce service cost
• 43 - 52T aluminum cluster backward compatible with 9 - 50T Helix Plus or Race cassettes
• Unique 9T high gear allows use of smaller chainrings for clearance and weight savings
• 5 bright anodized or PVD color options
• Tested extensively for analog and e-bike use

Specifications:

• Materials: 2 aluminum cogs, 10 steel cogs & PVD finishing on Intergalactic model improves durability and wear life
• Drivetrain Speed: 12
• Gearing: 9, 11, 13, 15, 17, 20, 23, 27, 31, 36, 43, 52T
• Gear Range: 578%
• Weight: 404 g

Compatability:

• SRAM®, Shimano®, and TRP® Shifters and Derailleurs of the same gearing count and similar cage capacity
• XD™ and XDR™ Freehub Drivers Only

Note: Hope XD drivers are undersized at the clamp location and require a Cassette Shim Kit.