The specialized stumpjumper comp carbon 6fattie 275 plus mountain bike 2017 is the future for trail bikes it features the all new 6fattie wheel system that takes 650b wheels and wraps them in 30 tyres the result levels of traction control and floatation that will shake your idea of trail riding to the core and to set things over the top we designed it work seamlessly with the revolutionary new stumpjumper fsr frame the frame of the specialized stumpjumper comp carbon 2017 is const