Ribble endurance 2016 disc road bike the ribble endurance represents ribbles entry into the domain of road race bikes with disc brake compatible frame and forks featuring an asymmetric rear triangle that has been reinforced on both sides to counteract the forces generated by both the disc brake and chaindrive side the full carbon fork has also been reinforced to withstand the forces generated by disc brakes designed to be used with a 140mm rotor 316mm seatpost braze on front mech 9mm qr 25mm