Helix Plus 12-Speed 9-50T Cassette

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INDUSTRY LEADING: Helix Plus 12-speed, 556% Range, 406g

More Range, Less Weight
The HELIX PLUS Cassette is an upgrade to any SRAM™ Eagle or Shimano™ drivetrain*, with more range than any other cassette on the market. The 9 tooth cog lets you step down one chainring size while keeping the same top end gearing and provides not only better ground clearance, but an overall lighter drivetrain.


  • Compatible with SRAM™ and Shimano™ 12 speed drivetrains
  • Improved shifting performance including Shimano™ 12 Speed compatibility
  • Improved interface between steel and aluminum clusters
  • E*spec uprated for E-bike use
  • 2-piece design allows for replaceable aluminum cogs 


  • Reduces rear wheel weights, improves braking, suspension function and handling
  • Designed to shift with Shimano™ and SRAM™ systems without compromise, so the rider can change components without concern
  • e*thirteen’s wider range and 9 tooth cog allows riders to run a 2 tooth smaller chainring for more clearance and reduced weights

*Requires XD Driver

*Hope XD drivers are undersized at the clamp location and require a Cassette Shim Kit

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Product Spec


Works flawlessly with Shimano™ and SRAM™ 12s drivetrains, despite the challenges in designing for the different cog spacing and chain behavior.

Please reference our hub compatibility article to ensure the e*thirteen cassette will work on the hub you have before purchase.

Freehub Mount
XD™ and XDR™ Drivers Only.
2 aluminum cogs, 10 steel cogs.
9-50T: 9, 11, 13, 15, 17, 20, 23, 27, 31, 36, 42, 50
12 Speed

Tech Info

User manual
Frequently Asked Questions

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