Drivetrain System (34)

Option: 1, Crankset only(48T, Silver): 48-36-26T 2, Crankset + BB(48T, Silver): 48-36-26T, come with bottom bracket 3, Crankset only(44T, Black): 44-32-22T  4, Crankset + BB(44T, Black): 44-32-22T, come with bottom...

Option:  1, Crankset only(50T): Crankset 50-34T 2, Crankset(50T) + BB: Crankset 50-34T,come with Jiankun original bottom bracket 3, Crankset only(53T): Crankset 53-39T 4, Crankset(53T) + BB: Crankset 53-39T,come with Jiankun...