E-Thirteen Helix 11 Speed Race Cluster - XD Driver - Bronze - 46T - 11 Speed Back in Stock The Pro model is designed

The Pro model is designed specifically for workshops and teams

Tread pattern: The DHF's ramped center knobs provide fast rolling with consistent traction

New single sizing for a perfect fit

Easy upgrade for any Topeak floor pump

E-Thirteen Helix 11 Speed Race Cluster - XD Driver - Bronze - 46T - 11 Speed Back in Stock The Pro model is designedUnlike SRAM Eagle, Helix R cassettes have replaceable gear clusters. That means ongoing service and replacement costs will be less than half that of SRAM cassettes. When installing the Helix R cassette, as with any cassette, it's recommended to check for chain wear. If your chain shows 0. 5% or more wear, you will significantly decrease the wear life of your new cassette. Installing a new chain with your new cluster is a much better and economical