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110BCD/130BCD Road Bicycle Double Chain 34T-50T 36T-52T 39T-53T 42T-55T-46T-56T

110BCD/130BCD Road Bicycle Double Chain 34T-50T 36T-52T 39T-53T 42T-55T-46T-56T

Applicable specifications: 110BCD&130BCD. 110BCD:34T/50T/36T/52T/39T/53T. 130BCD:39T/53T/42T/55T/46T/56T. Product: Highway Double Sprocket Crank Set Accessories. --The width of the corresponding spur gear; The negative chain corresponding to the tooth is circular.