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

The result is even quieter

Rim Outer Width 31mm

erasing rolling resistance

Two joint bushings

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