If your idea of trail riding follows the philosophy of quotgo big or go homequot you simply can39t beat the agility and responsiveness that a 650b provides knowing this we built our stumpjumper fsr expert carbon 650b to be the ultimate all rounder trail bike it features a workhorse sram one by groupset and the no holds barred guide r hydraulic disc brakes to round out a build that places an equal focus on durability and efficiency at the frame you39ll find our fact 9m carbon fibre t