CHAINRING ROTOR Q-RING QX-3 4X64MM 23T. SHIMANO XT

Fits all cranksets 104/64mm BCD, 9 speed. Rotor Q-Rings help to minimize the time spent in the dead spot while pedaling. While oval chainrings have historically been controversial, we believe that allowing a rider to fine tune the chainring position offers opportunities to minimize the dead spot never before realized with conventional chainrings. The OCP system (Optimum Chainring Position) enables you to customize the position of the Q-Rings where they best suit your personal needs and desires.