E-Thirteen Helix 11 Speed Race Cluster - XD Driver - Grey - 46T - 11 Speed eBay The Blok comes with a

The Blok comes with a spare clear lens and a pack of tear-offs included

TRP state that the TR12 rear derailleur works best with the Sram PG-1230 NX Eagle 11-50 cassette for HG freehubs and that it also works very well with Sram XG-1275 GX Eagle

Easy to install with very high pressure resistant

Works great as a front or rear on a trail bike

Recharge Time: 3 hours

E-Thirteen Helix 11 Speed Race Cluster - XD Driver - Grey - 46T - 11 Speed eBay The Blok comes with aUnlike 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