At e*thirteen, we're always striving to bring something new to the table. That's why we created the Helix cassette line – to offer unparalleled cross-compatibility without sacrificing performance.

As e-bikes have become more popular, we set out to engineer a close-ratio cassette specifically for them. Enter the Helix Race 13-52T - a 12-speed close-ratio cassette specifically engineered for steep terrain where climbing speeds are high and descents are gravity-powered.

The 13T, combined with a 32T chainring, at 85rpm cadence, will deliver speeds at or just above 32kmph/20mph, just beyond the speed-limited assistance of most e-bikes. The 52T lowest gear and closer steps help riders clean the most technical climbs with newfound ease.

While the Helix R 13-52T was conceived for e-bikes, it also improves the ride experience for non-e-bike riders, allowing all riders to optimize cadence on steep climbs and let gravity do the work on descents.

Like all e*thirteen Helix cassettes, the Helix Race 13-52t delivers seamless compatibility with SRAM®, Shimano®, and TRP® Shifters and Derailleurs of the same gearing count and similar cage capacity. (Mounts on an XD driver only)

Experience the advantages of a close-ratio cassette on your next ride with the Helix Race 13-52T. 

Features
Helix Race: 13-15-17-19-22-25-28-32-36-40-45-52 vs Eagle™: 10-12-14-16-18-21-24-28-32-38-44-52
Aluminum and steel clusters can be replaced separately to reduce service costs.
Patented two-piece aluminum/steel construction for strength, stiffness, lightweight performance and durability.

Specifications 
Compatibility: Compatible with SRAM®, Shimano® and TRP® shifters and derailleurs of the same gearing count and similar cage capacity.
Freehub Mount: XD™ and XDR™ drivers only
Material: 2 aluminum cogs, 10 steel cogs; PVD finishing on Intergalactic model improves durability and wear life
Range: 400%
Size: 13–52T (13, 15, 17, 19, 22, 25, 28, 32, 36, 40, 45, 52)
Speeds: 12-speed

Mfr Claimed Weight
467g