e*thirteen components

Helix R 12 Cassette Cluster

After miles and miles of trail riding, rather than having replace your entire expensive cassette, e*thirteen's Helix R Cassette allows you to replace only the faster-wearing alloy cogs and keep using the heartier steel cogs for multiple seasons. Since the 42-50t cluster is separate, you can replace only those that you've been putting through the paces on the local climb. When it comes time to replace the steel cluster, the 9-36t option will take care of the smaller cogs. The Helix R Cassette is compatible with both SRAM and Shimano systems, with a wider gear range than either with that 9-tooth cog.