Universal Italian parts manufacturer, the leading Italian brake before Campagnolo entered the brake market. Universal Joint A mechanical linkage which allows two parts to flex with respect to one another, but not to rotate. The primary bicycle application of universal joints is for single-wheel trailers. Upright Upright handlebars are used on most of the world's bicycles. They permit a fairly erect posture of the upper body, and are more comfortable for cyclists who ride at a low intensity level.
Cyclists seeking greater speed or efficiency often prefer drop handlebars.
Upright bicycles are conventional bicycles, providing an upright riding position, as opposed to recumbents. The act of shifting to a higher gear . In the case of derailer gearing, this means shifting to a smaller rear sprocket , or a larger chainwheel . U.S.S. U nder S eat S teering Unicrown A type of fork in which the upper ends of the blades bend together to attach directly to the steerer , eliminating a separate crown . This style of fork is common on mountain bikes and hybrids .