ROTOR Q Rings BCD110x4 Aero. Q RINGS BCD110x4 oval chainrings compatible with all ROTOR cranks using BCD 110x4 spider or INspider power meter. In addition, these chainrings are also compatible with Shimano Dura-Ace FC-9100 and Ultegra FC-8000 cranks, offering fast and precise shifting, as well as a more aerodynamic and attractive aesthetic. Q RINGS oval chainrings allow you to pedal more efficiently, taking advantage of the maximum power of your pedaling and reducing the stress on your knees.