Rotor Q-Ring Set Q130 53/39 - BCD130 | ProBikeKit.com
SRM power meter with Rotor Q rings - 53/39 - 130BCD - 175mm cranks | eBay
ROTOR Bike Components - Now you can assemble your Shimano® Dura-Ace R9100 or Shimano® Ultegra R8000 cranks with the new ROTOR Q RINGS BCD110X4 and enjoy all the advantages of oval chainrings. #
ROTOR DM Oval Chainring - 2x | Rotor America
ROTOR Kettenblatt Q-Rings Doppel | Direct Mount Oval Spidering 2-fach, 179,50 €