Drivetrain System (3)

1, Crankset only 2, Crankset + BB: come with BB-RS500 or BB-RS501 BSA bottom bracket —————————————————————————— Model: FC-RS520 Color: Black Speed: 2×12 Speed Chainring: 50-34T  Feature: 2-PIECE CRANKSET Compatible chain:...

Option: 1, Crankset only 2, Crankset + BB: Come with SM-BBR60 bottom bracket (BSA) —————————————————————————— Model: FC-R7100 Level: 105 Color: Black Speed: 2x12 Speed Chainring: 52-36T Compatible chain: HG 12-speed...

Option: 1, CN-M6100(116Link) = A110402-116 2, CN-M6100(118Link) = A110402-118 3, CN-M6100(124Link) = A110402-124 4, CN-M6100(126Link) = A110402-126 5, CN-M7100(116Link) = A110401-116 6, CN-M7100(124Link) = A110401-124 7, CN-M8100(116Link) = A110403-116 8,...