The f3x crush the competition and land on the podium with the f3x boasting bold belgian inspired graphics the frame is engineered from innovative uhc advanced textreme carbon fiber which is light stiff and strong with seamless shimano ultegra drivetrain and hydro disc brakes this bike is ready to take on the grueling challenges of cyclocross shimano ultegra drivetrain light action vivid shifting is just one of many features taken from shimanorsquos top end groupsets making the ultegr