Helix Race Cassette - 12-Speed 13-52t, Gray multi-tools coupled with a woven S-logo

coupled with a woven S-logo on the back

Stealth® S1 dotty rubber outsole for unbeatable grip

Adult assembly is required

By studying the flexing and breathing of carbon fiber

Delrin adaptors fit between bearings and crank spindle

Helix Race Cassette - 12-Speed 13-52t, Gray multi-tools coupled with a woven S-logoThe 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