Materials: Made from Bluesign approved 50% combed and ring spun cotton

Stamp small recommended for shoe sizes: 5-10 (US) // 37-43 (EU)

Weight: 286g for an XD Driver

Pros: Stiff where it needs to be

E-Thirteen Helix 11 Speed Race Cluster - XD Driver - Bronze - 46T - 11 Speed Dangerous Goods Materials: Made from Bluesign approvedUnlike 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