Russian type bicycle B.B. cup set SC-BB-109 with a 35 mm x 1 mm LH-RH thread, made for the bottom bracket shell where the crank axle runs on its bearings. The cups hold those bearings in place in the frame. It comes as a set of 3 in a golden colour: two threaded cups with slotted faces and a notched lockring. Finish options are BCP/ZP/CP/Golden. Catalogue code: SC-BB-109