The newest addition to the Goldsprint Crankset models is this clean and strong Ultimate OS Crankset with hollow axle and external bearings. This crankset is the perfect choice if you want a stiff and light crankset for your performance track bike and dont want to spend your moeny on a SRAM Omnium. The crankset comes with a stiff 48t chainring made for wide 1/8″ chains and an Bottom bracket für standard BSA threading.