E-Thirteen Helix 12 Speed Race Cluster - XD Driver - Grey - 42-50T - 12 Speed Images Uploaded - Ready for Review Available in a range of

Available in a range of popular sizes

strengthen and stimulate your body and ensure you are in the best possible condition

15% lycra (spandex)

Pre-Cut & Shaped (14 pieces)

Who's this item for: This is a premium chain for riders that demand the best performance you can get

E-Thirteen Helix 12 Speed Race Cluster - XD Driver - Grey - 42-50T - 12 Speed Images Uploaded - Ready for Review Available in a range ofUnlike 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. As an added bonus, Helix R 12s clusters are backward compatible with and can be used to upgrade your existing TRS+ 9 50 cassette. 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