Description:

e*thirteen 12 Speed Aluminum Cogs 42-50T for a 9-50 Helix Cassette Black

Helix Plus 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 12s clusters are backward compatible with and can be used to upgrade your existing TRS+ 9-50 cassette.
When installing the Helix Plus cassette, as with any cassette, we recommend checking 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 solution.
PRODUCT SPEC
Freehub Mount XD™ and XDR™ Drivers Only
Material 2 aluminum cogs, 10 steel cogs.
Range 556%
Size 9-50T: 9, 11, 13, 15, 17, 20, 23, 27, 31, 36, 42, 50
Speeds 12 Speed
Weight 406g