Sturmey Archer BF/C and AB/C
The BF-C and AB-C are "classic" Sturmey hubs. These 90mm hubs were originally intended for tandem bikes but the huge drums will stop a regular bike FAST. The BF/C is a 90mm front drum and the AB/C is a 3-speed with 90mm rear drum. The 'C' revision of these hubs has the revised driver assembly found on all new Sturmey Archer hubs since around 1989 or so.
BF-C.AB-C.pdf — PDF document, 1711Kb