E-Thirteen Helix 12 Speed Race Cassette

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RRP: $550.00 - $600.00
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The HELIX R 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.

The improved tooth profile of the Helix cassette's features Shimano 12-speed level shifting performance with the improved reliability of a steel and aluminium assembly. The Intergalactic PVD finishing is twice as durable as anodised models and is 60G lighter.

These cassettes have a huge 556% range and are lighter than XTR and XX1 models. The aluminium one-piece 42/50 tooth cluster is easily replaceable so riders can keep their steel cluster for multiple seasons and freshen up the granny as needed without buying a whole new cassette. They are even backwards compatible and can be used to upgrade the TRS+ 9-50t cassettes.


  • Works flawlessly with Shimano and SRAM 12s drivetrains, despite the challenges in designing for the different cog spacing and chain behaviour.
  • Additionally, if your wheel has a SRAM XD Driver and you want to upgrade to Shimano 12s, you not only save money on the cassette and don’t have to spend the extra on a new hub driver.


  • Freehub Mount: XD and XDR Drivers Only
  • Material:2 aluminium cogs, 10 steel cogs. (PVD finishing on Intergalactic model is twice as durable as anodised models).
  • Range: 556%!
  • Tooth Count: 9-50T: 9,11,13,15,17,20,23,27,31,36,42,50
  • Speeds: 12 Speed
  • Weight: 345 Grams (lighter than both XTR and XX1)

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Cassette Fitment
XD Driver
12 Speed
$‎550.00 $‎499.95
XD Driver
12 Speed
$‎550.00 $‎499.95
XD Driver
12 Speed
$‎600.00 $‎549.95
XD Driver
12 Speed
$‎550.00 $‎499.95
Only 1 left!
XD Driver
12 Speed
$‎550.00 $‎499.95
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Bronze - XD Driver - 12 Speed - 9-50T640117621073
Grey - XD Driver - 12 Speed - 9-50T4710751508781
Intergalactic - XD Driver - 12 Speed - 9-50T640117621066
Orange - XD Driver - 12 Speed - 9-50T640117621080
Purple - XD Driver - 12 Speed - 9-50T640117621097

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