It's time to develop a more efficient pedal stroke with the Rotor Road Inner Q Ring. Not only does the Q Ring's unique oval shape smooth your pedal stroke to maximize your power potential, its redesigned pins and ramps now provide faster shifting. Optimum Chainring Positioning offers a range of mounting positions to ensure that every rider can achieve leverage and torque transmission with the Q Ring. The Rotor Road Inner Q Ring fits Agilis and 3D Cranksets and is also compatible with most every crankset and BCD bolt circle diameter currently available. The 113mm and the 135mm Campagnolo specific rings will work with 10 speed Ultra Torque cranksets, but they are not compatible with 2011 11 speed cranks due to a new fastener design.