alloy bike cranksets bottom bracket pf30 bb30 bb386 bsa sealed bearing road mountain bicycle bb sets 42 46 x 24/30mm

- body is made of aluminium alloy material, pc central, weight reduction but keep the better strength; - use for full carbon frame, compatible with shimano sram; - sealed bearing in two sides, rotate smoothly and durable; - standard black and red color, elegant atmosphere, using different styles of bikes; - cnc machinining, taiwan procedure, bb30, pf30, bb386, bsa30 models; - press in and thread in types, easy to install; - carton box packed, secure package with fast shipment; - customized logo and pack is acceptable if you need a large quantity.