Shimano has discontinued production of the Ultegra FC-R8000 11-speed road bike crankset. As an alternative, the FC-RS510 road bike crankset or the 105 FC-R7000 crankset arms (without chainrings) are available. Chainrings and spare parts are still available.
Road bike chainring, Shimano Ultegra FC R8000, 110mm bolt circle, 4-arm asymmetrical, small chainring on the inside, 11-speed, type MS, 46 teeth
Road bike chainring, Shimano Ultegra FC R8000, 110mm bolt circle, 4-arm asymmetrical, small chainring on the inside, 11-speed, type MT, 36 teeth
Shimano Ultegra FC-R8000 chainring, 110mm bolt circle, 4-arm asymmetrical, large chainring on the outside, 11-speed, type MT, 46 teeth
Shimano Ultegra FC-R8000 chainring, 110mm bolt circle, 4-arm asymmetrical, large chainring on the outside, type MS, 11-speed, 50 teeth
Road bike chainring, Shimano Ultegra FC R8000, 110mm bolt circle, 4-arm asymmetrical, large chainring on the outside, 11-speed, type MT, 52 teeth
Road bike chainring, Shimano Ultegra FC R8000, 110mm bolt circle, 4-arm asymmetrical, large chainring on the outside, 11-speed, type MW, 53 teeth
Original Shimano Ultegra bottom bracket, SM-BBR60, for Hollowtech II road bike cranksets, BSA thread, 68 mm installation width