a small compact pack is all you need

Minimum: 180mm

no matter what nature throws at you

6mm - 188 x 88mm (at the longest and widest points)

This delivers 20% more water per sip when compared to their standard reservoirs and it also has an internal baffling system to minimise the sloshing and prevents it from getting all huge and bloated when you fill it up

E-Thirteen Helix 12 Speed Race Cluster - XD Driver - Naranja - 42-50T - 12 Speed Images Uploaded - Ready for Review a small compact pack isUnlike 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. As an added bonus, Helix R 12s clusters are backward compatible with and can be used to upgrade your existing TRS+ 9 50 cassette. 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