Genuine Shimano HollowTech II bottom bracket assembly. For Shimano Hollowtech type crank spindles (24mm axle).
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Shimano UN55 68mm Shell English Thread Sealed Cartridge Taper Bottom Bracket
Shimano BB-R9100 Dura-Ace HollowTech II bearing cups - 68 mm English thread
Shimano BB-RS501 bottom bracket cups; English thread cups
Shimano Ultegra Bottom Bracket Cups Road Bike Replacement BB 6800 English Thread
Shimano Ultegra Bottom Bracket 6800 BS Cups English Thread Genuine Replacement
