E-Thirteen Helix 12 Speed Race Cluster - XD Driver - Intergalactic - 42-50T - 12 Speed eBay Markings: Trim/cut markings

Markings: Trim/cut markings

Bottom Bearing: Hellbender

Interchangeable temple lengths for improved helmet compatibility

Adjustable Velcro tabs on each hip keep the waist in check with a snap button fastener in the centre to avoid dropping your shorts

E-Thirteen Helix 12 Speed Race Cluster - XD Driver - Intergalactic - 42-50T - 12 Speed eBay Markings: Trim/cut markingsUnlike 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