the 2 speed and rim brakes were standard from the factory for 2 years of the american,they were anoption for many early years as wall,there were variuos fork clamps depending on what fork you had,also different cable lenghts for the grakes and 2 speed,i have a set on my 49 phantom and 2 americans that have them,somewhat hard to find complete,the setup for the tubular or springer are the hardest to find,alot of the pieces are marked schwinn including the pads which are marked schwinn and are harder than caliper pads,uses the same brake handle as the front drum brake,except thehandle is for the left side so the schwinn script is on the outside of the left handle