ULTEGRA 6800 ULTEGRA Di2 6870 Shimano 105 5800 TIAGRA 4700 SORA R3000 Claris 2400 Tourney A070 DURA-ACE 场地车 7710 █休 闲车零部件 ALFINE S700/S7000-8 ALFINE Di2 S705 Nexus INTER-8 C6000 Nexus INTER-7 C3000 Nexus INTER-3 3R40 Capreo F800 SHIMANO产品代码 中轴 B B Bottom Bracket 链轮 ...