e*thirteen Helix Plus Replacement Cluster / Pinion - 9-36 Teeth | 12-speed SRAM XD/XDR - black

Replacement pinion for the e*thirteen Helix Plus cassette with a gradation of 9-36 teeth. Features of the e*thirteen Helix Plus Replacement Cluster / Pinion renews your Helix Plus cassette made of steel backwards compatible with TRS+ 9-50 cassettes compatible with SRAM XD /XDR freewheels (sold separately) Note: When installing the Helix Plus cassette, the manufacturer recommends checking the wear of the chain, as with any cassette. If your chain shows 0.5% or more wear, the service life of your new cassette will be significantly reduced. Installing a new chain with your new sprocket unit is a much better and more economical solution.