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...
A practical guide to adjusting direct-pull brakes ('V brakes')to get the best braking performance on your bicycle.
Adjusting device for brakes incorporates rod with forked ends, slide piece bar with bend in it, brake lining and drumThe adjusting device incorporates a rod (1) with forked ends and on which moves a slide piece (2). The walls (2a,b) are preferably crosswise to the rod. Between the ...