The Helix Race 9-50T is e*thirteen's wide-range 12-speed MTB cassette: a 9-tooth smallest cog gives 556% range so you can run a smaller chainring for the same top-end gearing, with better ground clearance and a lighter overall drivetrain.

Highlights

  • 556% gear range from a 9-50T spread
  • 9-tooth smallest cog — step down one chainring size for the same top gear
  • 2 aluminium cogs, 10 steel cogs
  • Bronze/Nickel anodised and plated finish
  • Engineered to shift cleanly on Shimano and SRAM 11/12-speed drivetrains
  • XD and XDR freehub compatible

Cross-brand compatibility

e*thirteen designs the Helix Race cassette's tooth profile to shift with both SRAM and Shimano derailleurs and shifters of matching speed and cage capacity, so an XD-driver wheel built for SRAM can take a Shimano 12-speed upgrade without a new hub.

Compatibility & fit

Mounts on an XD or XDR freehub body (XDR needs the 1.85mm spacer that comes with the hub). Hope-brand XD drivers are slightly undersized and need e*thirteen's cassette shim kit. The Tune workshop can confirm fit and fit the cassette.

e*thirteen covers the Helix Race cassette for 10 years against manufacturing and material defects, plus a discounted crash replacement policy. For warranty support, return the product to Tune Cycles and we'll manage the claim with e*thirteen's Australian distributor. This is in addition to your rights under the Australian Consumer Law. Keep your proof of purchase.
  • 9-50T, 556% range
  • 2 aluminium cogs, 10 steel cogs
  • XD/XDR freehub
  • Shimano and SRAM 11/12-speed compatible
  • Bronze/Nickel finish
Brande*thirteen
ModelHelix Race
Speeds12-speed
Range9-50T, 556%
Tooth counts9-11-13-15-17-20-23-27-31-36-42-50T
FreehubXD / XDR
Material2 aluminium cogs, 10 steel cogs
Weight384g
ColourBronze/Nickel
SKU DTW-ETG-CSHX12KFW2RA-102
Barcode # 640117621073
Brand e*Thirteen
Shipping Weight 0.9000kg