If you're looking for the ultimate in lightweight, race-bred hardtails, your search is over. New for 2017, the Reaction GTC One12 takes our acclaimed carbon chassis and pairs it with SRAM's ground-breaking X01 Eagle 1x12 transmission. Super-fast, clean shifts controlled from a single shifter leaves you to concentrate on getting the power down to the trail. The result? Unmatched speed and control.

Frame: Our engineers threw everything they know about carbon frame technology at the Reaction GTC One12's chassis. That's why it's built with our stiffness-enhancing, weight-reducing Twin Mould technology and incorporates internal cable routing for cleaner looks and longer cable life. Our acclaimed Agile Ride Geometry brings the nimble handling of smaller wheeled bikes to our 27.5 and 29in range, while X12 dropouts keep everything tracking straight and true and the 27.2mm seatpost adds welcome comfort, even on long rides.

Features: No two ways about it - SRAM's X01 Eagle transmission sets new standards for mountain bike shifting performance. With a single 34 tooth chainring up front and wide-ranging, closely spaced 12 speed 10-50 tooth cassette at the rear, the phenomenal gear range is on tap without frustrating, time consuming double shifts. RockShox's reliable Reba RL fork and SRAM Level hydraulic discs with a 180mm rotor at the front round out the main components. And we backed up all this phenomenal performance with a Fulcrum Red 44 wheelset shod with Schwalbe's light, grippy and fast accelerating Racing Ralph and Rocket Ron tyres.