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Helix Race 12-Speed 13-52T Cassette



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 new 12-speed close-ratio cassette, specifically engineered for steep terrain where climbing speeds are high, and descents are gravity-powered. 

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

While the Helix R 13-52T was conceived with e-bikes in mind, it improves the ride experience for non-e-bike riders, too, allowing them to optimize their 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 cross-compatibility with SRAM, Shimano, and TRP 12s drivetrains, as well as improved shifting precision and wear life. Weighing in at 467g, the cogs are reinforced for high-powered e-bikes, yet light enough for weight-optimized trail bikes.

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

  • Close ratio gearing cassette for better cadence and improved shifts under load
  • Lower fatigue and extended range (Bio or Battery) with sweet spot cadence for max efficiency
  • Helix R 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
  • Cross-compatibility with Shimano, SRAM, and TRP drivetrains and chains
  • Aluminum and Steel clusters can be replaced separately to reduce service cost
  • Patented two-piece aluminum/steel construction for strength, stiffness, light weight, and durability
  • Reinforced for e*spec strength - 467g weight
  • 5 bold anodized or PVD color options
  • Tested extensively for analog and e-bike use
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Product Spec

Freehub Mount
XD™ and XDR™ Drivers Only
2 aluminum cogs, 10 steel cogs. PVD finishing on Intergalactic model improves durability and wear life.
13-52T: 13, 15, 17, 19, 22, 25, 28, 32, 36, 40, 45, 52
12 Speed

Tech Info

Guaranteed to be free from
defects in materials or workmanship
for 5 years after original purchase