- Aluminum Custer: 42,50t
- Steel Cluster: 9,11,13,15,17,20,23,27,31,36t
e*13 Helix R 12 Replacement Cluster
Unlike other brand, Helix R cassettes have replaceable gear clusters. That means ongoing service and replacement costs will be less than half that of other brands 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.