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Helix Plus 12-Speed 9-50T Cassette


More Range, Less Weight

Engineered for E-bike durability and cross experience compatibility with SRAM™ and Shimano™ drivetrains. This 9-50T combination is the hot set up for your 12 Speed MTB and allows for a 2 tooth smaller front chainring, shorter chain length, more clearance and range with our exclusive 9 tooth smallest cog.

Future proof your bike, save weight and cash with the Helix Plus Cassette. 


  • Compatible with SRAM™ and Shimano™ 12 speed drivetrains
  • 2-piece design allows for replaceable aluminum cogs
  • E*spec uprated for E-bike use


  • Reduces un-sprung rear wheel weight for improved suspension function and handling
  • Excellent shifting with Shimano™ and SRAM™ systems without compromise
  • e*thirteen’s wider range and 9 tooth cog allows riders to run a 2 tooth smaller chainring for more clearance and reduced weights
  • Helix R performance at a competitive price
™ driver required.
Hope XD drivers are undersized at the clamp location and require a Cassette Shim Kit click here to get one
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Product Spec

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