With a flat aerodynamic profile and quick acceleration, the ULTEGRA R8170 C36 wheelset impresses every mountain rider and delivers performance that excites every road cyclist. With the speed and efficiency of tubeless tires, the reliable everyday performance of a flat, aerodynamic carbon rim, and the comfort of 11- and 12-speed compatibility, the new ULTEGRA R8170 C36 wheelset represents an upgrade for any road bike.