ethirteen Helix Plus 12-Speed 9-50T Cassette
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ethirteen Helix Plus 12-Speed 9-50T Cassette Info
The Helix Plus 12-Speed 9–50T Cassette from ethirteen delivers expanded range and reduced weight in a package built to handle modern MTB and e-MTB demands. Centered around ethirteen’s signature 9-tooth small cog, this cassette lets riders unlock more usable gearing while optimizing drivetrain efficiency and bike clearance.
By pairing a 9–50T spread with a smart two-piece construction, the Helix Plus allows you to run a chainring that’s two teeth smaller than conventional setups—improving ground clearance, shortening chain length, and trimming rotating mass. The result is a drivetrain that feels lighter, shifts cleanly, and stands up to higher torque loads, making it equally at home on acoustic trail bikes and e-MTBs.
Helix Plus 12-Speed 9–50T Cassette Specs at a Glance
- Speed: 12-speed.
- Tooth Range: 9–50T.
- Freehub: XD driver required.
- Construction: Two-piece design with replaceable aluminum cogs.
- E-Bike Rating: e*spec uprated for higher torque applications.
- Compatibility: SRAM, Shimano, and TRP shifters and derailleurs of the same speed with similar cage capacity.
Design Benefits
- Wider, Smarter Range: The 9-tooth cog expands gearing while enabling smaller chainring setups.
- Weight Savings: Reduced chain length and lighter gearing help cut unsprung rear wheel weight.
- Clean Shifting: Optimized for consistent performance with both Shimano and SRAM systems.
- Serviceable Design: Replaceable aluminum cogs lower long-term ownership costs.
Compatibility & Setup Notes
The Helix Plus 12-Speed 9–50T Cassette mounts on an XD driver only. It is compatible with SRAM, Shimano, and TRP 12-speed drivetrains when paired with derailleurs of appropriate cage capacity. Some Hope XD drivers may require a cassette shim kit due to undersized clamp locations.
Final Take
The Helix Plus 12-Speed 9–50T Cassette is a future-ready drivetrain upgrade that blends wide-range gearing, reduced weight, and e-bike durability at a competitive price. For riders looking to maximize clearance and efficiency without sacrificing shift quality, it’s a standout option in the 12-speed MTB category.
