A U brake uses studs (bosses) attached to the front fork or frame above the rim, rather than below it, as with conventional cantilevers. U brakes use the same type and placement of studs as roller-cam brakes do. In 1986-88 there was a fad for equipping mountain bikes with U brakes...
Tool for adjusting bicycle brakesdoi:USD281140 SScura, BrianUS
Roller-cam brakes were developed by Charlie Cunningham, one of the Marin County, California mountain-bike pioneer bicycle builders. Roller-cam brakes were first sold by Wilderness Trail bikes, and were made in quantity by SunTour. Cunningham continued to refine his brake designs with "toggle link...
Device for adjusting the oil pressure in the case of bicycle - disk brakesA disc brake oil-adjusting device for bikes includes a handle, a main cylinder and an auxiliary cylinder having one end communication with the main cylinder and the other end protruding out of the handle. An adjusting ...
A practical guide to adjusting direct-pull brakes ('V brakes')to get the best braking performance on your bicycle.