e*thirteen Helix Plus Cassette - 12-Speed, 9-50t, Black

Helix Plus 12-Speed 9-50T cassettes are a drivetrain upgrade on a budget for analog and e-bikes alike. Engineered to deliver Helix shifting precision, and cross compatibility with all SRAM™ and Shimano™ 12-speed drivetrains, the Helix Plus is also e*spec rated to withstand the rigors of e-MTB. e*thirteen's exclusive 9 tooth highest gear cog, provides a 556% gear range, and lets you step down one chainring size, while keeping the same top end gearing, meaning both better ground clearance and an overall lighter drivetrain. Features 10 steel cogs and a 42-50t aluminum cluster that can be replaced as needed. Cross-compatible with Shimano and SRAM drivetrains, including electronic shift systems. XD driver compatible. e*spec rated for use on e-bikes . Engineered with improved durability of 2 part steel and aluminum assembly.