Drivetrain › Shimano Ultegra R8000 Chainring - 50 Tooth 11-Speed 110mm BCD For 50-34T Combination Image 1 of 1 Shimano Ultegra R8000 Chainring - 50 Tooth 11-Speed 110mm BCD For 50-34T Combination $182.00 This Shimano chainring allows you to update your Ultegra FC-R8000 11-speed crankset with a chainring configuration to best fit your riding style. Add To Cart Added! This Shimano chainring allows you to update your Ultegra FC-R8000 11-speed crankset with a chainring configuration to best fit your riding style.