e*thirteen Helix Race 12-Speed 13-52T Cassette - Eggplant Size:13-52 5-way valves are provided for

5-way valves are provided for ultimate airflow)

Left/right power balance

Your run doesn’t stop where the road drops off

Optimized carbon layup provides a robust yet lightweight structure and pairs with a 72-tooth hub to maximize power transfer

e*thirteen Helix Race 12-Speed 13-52T Cassette - Eggplant Size:13-52 5-way valves are provided forAt e*thirteen, we're always striving to bring something new to the table. That's why we created the Helix cassette line to offer unparalleled cross compatibility without sacrificing performance. As e bikes have become more popular, we set out to engineer a close ratio cassette specifically for them. Enter the Helix Race 13 52T a 12 speed close ratio cassette specifically engineered for steep terrain where climbing speeds are high and descents are