e*thirteen Helix Race 12-Speed 13-52T Cassette - Black Size:13-52 we have over a decades

we have over a decades worth of test data and efforts directed at continuous improvement to make the world’s strongest

Tires: CADEX Race

and leverage

erasing rolling resistance

(F) Shimano RS470

e*thirteen Helix Race 12-Speed 13-52T Cassette - Black Size:13-52 we have over a decadesAt 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