e*thirteen Helix Race 12-Speed 13-52T Cassette - Bronze Size:13-52 Ergonomically shaped soft-touch handle

Ergonomically shaped soft-touch handle

Minimises the weight of the garment

The GX Eagle Transmission DUB crankset gives no-nonsense riders a no-compromise balance of form and function

A modular design lets you switch between road and MTB bodies while keeping the same power sensor

The rotor uses internal fins to allow the air to flow between the two friction parts

e*thirteen Helix Race 12-Speed 13-52T Cassette - Bronze Size:13-52 Ergonomically shaped soft-touch handleAt 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