Hydra Classic Boost 6B Rear Hub Hydration Also compatible with other indoor

Also compatible with other indoor trainer apps by removing the Zwift Cog and replacing with cassette of choice

Its steel construction and SRAM's PowerGlide technology combine to deliver miles of solid shifting and outstanding durability

and aero fit

37” x 24T

Engineered with anatomical design and Targeted Compression

Hydra Classic Boost 6B Rear Hub Hydration Also compatible with other indoorIndustry Nine Classic hubs are the heart of your wheelset, everything revolves around them, literally. Every Classic mountain hub is made start to finish in our Asheville, NC machine shop. From turning and milling bar stock 7075 T6 aluminum for shells, axles and encaps, wire EDM cutting A2 tool steel for pawls and driverings, to our own in house anodization lab, every step of design, engineering, manufacturing and assembly is done on premises to our