Helix Race Cassette - 12-Speed 13-52t, Gray multi-tools Mid-compression fit is supportive

Mid-compression fit is supportive

Delrin adaptors fit between bearings and crank spindle

Finding your rhythm can make or break your race

allowing you to easily dial-in its performance for any riding style and any terrain

resulting in the fastest tire we’ve ever made

Helix Race Cassette - 12-Speed 13-52t, Gray multi-tools Mid-compression fit is supportiveThe e*thirteen Helix Race 12 speed 13 52t cassette features close ratio gearing, specifically engineered for steep terrain where climbing time and shift frequency is high, and descents are gravity driven. By placing more gears where riders spend the majority of the time, they can optimize cadence and torque for improved climbing efficiency with smoother shifts under load for both analog and eBikes. Close ratio gearing cassette for improved shifts