The Reaction represents something rather special: it's CUBE's Formula One class of mountain bikes. Light, stiff, responsive and built for one purpose only - to go as fast as possible from A to B. To that end, we've poured all our accumulated carbon frame building experience into it. Featuring fast-rolling 29er wheels, the Reaction frame makes use of our C:62 carbon layup and features neat design touches like a Boost 148 rear axle and Stealth dropper post cable routing. Kitted out with a smooth, easily adjustable RockShox air fork, CUBE-built wheelset and a slick, reliable Shimano SLX and XT 2x11 transmission, we reckon it's missing just one vital component: you.