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