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Portage strap: a strap (usually made of leather) attached to the inside of the bike frame, designed to make carrying the bike over one's shoulder easier; Pulley wheel: see Jockey wheel; Power meter: a device on a bicycle that measures the power output of the rider; Quick release: a skewer with a lever on one end that loosens when the lever is ...
The front wheel from a racing bicycle. Bicycle wheel with wooden rim Nipples Spokes Cross-section of a rim A Shimano Dura-Ace freehub-style hub. A bicycle wheel is a wheel, most commonly a wire wheel, designed for a bicycle. A pair is often called a wheelset, especially in the context of ready built "off the shelf" performance-oriented wheels.
This page lists notable bicycle brands and manufacturing companies past and present. For bicycle parts, see List of bicycle part manufacturing companies.. Many bicycle brands do not manufacture their own product, but rather import and re-brand bikes manufactured by others (e.g., Nishiki), sometimes designing the bike, specifying the equipment, and providing quality control.
The Bicycle Wheel is an educational book that explains the structural theory of a wire wheel, and teaches the practical methodology of building bicycle wheels. [1]The book is made up of three parts.
29ers are mountain bikes that are built to use 700C or ISO 622 mm wheels. 27.5 bikes are mountain bikes that are built to use 650B or ISO 584 mm wheels. Downhill bikes are a specialized type of mountain bike with a very strong frame, altered geometry, and long-travel suspension. They are designed for use only on downhill courses.
From a mechanical viewpoint, up to 99% of the mechanical energy delivered by the rider into the pedals is transmitted to the wheels (clean, lubricated new chain at 400 W), although the use of gearing mechanisms reduces this by 1–7% (clean, well-lubricated derailleurs and a straight chainline), 4–12% (chain with 3-speed hubs), or 10–20% (shaft drive with 3-speed hubs).
The mechanism was invented in 1927 by Tullio Campagnolo, an Italian bicycle racer. He was frustrated when he attempted to change gears during a race. At the time there was but one cog on each side of the rear hub, so gear changes necessitated stopping, removing the rear wheel, flipping it over horizontally so that the opposite cog is engaged by the chain, and finally reinstalling the wheel.
Solid rubber tires and the long spokes of the large front wheel provided a much smoother ride than its predecessor. This type of velocipede was the first one to be called a bicycle ("two wheel"), and its shape led to the nickname penny-farthing in the United Kingdom. They enjoyed a great popularity among young men in the 1880s who could afford ...
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