E*thirteen Helix Race 12 Speed Cassette 9-50T

INDUSTRY LEADING:
9-50T Cassette  - Helix R 12-speed, 556% Range, 365-Grams

More Range, Less Weight
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.

Features:

- Sprockets 1 thru 10 in steel / Sprockets 11 and 12 in aluminium
- Large 556 % range due to the smallest sprocket with 9 teeth, making a smaller chainring possible
- Suitable for 12-speed drivetrains from Shimano or SRAM
- Optimised tooth design for enhanced shifting performance
- Very light - 360 grams only (lighter than XX1 and XTR cassettes)
- Design with interchangeable sprocket clusters