Box components Box One Prime 9 X-Wide Multi Shift Group Set Onyx Black

Wide range 9 speed multi-shift group with up to 3 gears per shift. Includes cassette rear derailleur shifter and chain. Ultra-wide ratio with consistent progression. Cassette features durable lightweight unibody construction and lightweight internal support disc. Shifter offers 2pc pull lever with up to 3 gears per shift. Carbon fiber / nylon composite steel aluminum alloy. Hard onyx finish