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Drop handlebars (of the "ergo" or "anatomic" variety) Porteur type bicycle handlebar, from an Italian Bianchi bicycle, circa 1940 A bicycle handlebar [ 1 ] is the steering control for bicycles . It is the equivalent of a tiller for vehicles and vessels, as it is most often directly mechanically linked to a pivoting front wheel via a stem which ...
Both quill and threadless stems come in a variety of bicycle handlebar clamp diameters. The ISO standard for the clamping area of a handlebar is 25.4 mm (1 inch), which is used on mountain bikes and many Japanese-made road handlebars. However, the Italian unofficial standard is 26.0 mm, which is the most common clamp size for road bars.
A bicycle, also called a pedal cycle, bike, push-bike or cycle, is a human-powered or motor-assisted, pedal-driven, single-track vehicle, with two wheels attached to a frame, one behind the other. A bicycle rider is called a cyclist, or bicyclist. Bicycles were introduced in the 19th century in Europe. By the early 21st century there were more ...
Bicycle racers seeking the greatest saddle-to-handlebar drop for better aerodynamics will often forego spacers and cut the steerer tube down to exactly match the headset bearing cup stack height plus the stem height. Cutting the steerer tube to its minimum length prevents switching to a taller stem or to a headset cups with a higher stack height.
Unlike the European city bike, it has mountain bike heritage, gearing, and strong yet lightweight frame construction. [ 2 ] [ 5 ] [ 6 ] [ 7 ] It usually features mountain bike-sized 26-inch (ISO 559) wheels, a more upright seating position, and "middleweight" 38–50 mm (1.5–1.95 in) heavy belted tires designed to withstand road hazards ...
In physics, energy density is the quotient between the amount of energy stored in a given system or contained in a given region of space and the volume of the system or region considered.