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Bicycle performance is measurable performance such as energy efficiency that affect how effective a bicycle is. Bicycles are extraordinarily efficient machines; in terms of the amount of energy a person must expend to travel a given distance, cycling is calculated to be the most efficient self-powered means of transportation .
Bicycle and motorcycle dynamics is the science of the motion of bicycles and motorcycles and their components, due to the forces acting on them. Dynamics falls under a branch of physics known as classical mechanics. Bike motions of interest include balancing, steering, braking, accelerating, suspension activation, and vibration. The study of ...
Note that, on a bicycle, as rake angle increases, head angle decreases. Trail can vary as the bike leans or steers. In the case of traditional geometry, trail decreases (and wheelbase increases if measuring distance between ground contact points and not hubs) as the bike leans and steers in the direction of the lean. [17]
Gear inches is an imperial measure corresponding to the diameter in inches of the drive wheel of a penny-farthing bicycle with equivalent (direct-drive) gearing. A commonly used metric alternative is known as metres of development or rollout distance, which specifies how many metres a bicycle travels per revolution of the crank.
Comfort bikes typically incorporate such features as front suspension forks, seat post suspension with wide plush saddles, and drop-center, angled North Road style handlebars designed for easy reach while riding in an upright position. Flat bar road bikes are road bikes fitted with mountain bike-style shifters, brake levers, and a flat ...
The longest bicycle wheelie in one hour is 30.95 km (19.23 mi), and was achieved by Manuel Scheidegger (Switzerland) in Bern, Switzerland on 12 September 2020. [ 131 ] Kurt Osburn (nicknamed Wheelie King ) from California , United States is the Guinness World Record holder for Longest Bicycle Wheelie , riding on the back wheel of a bicycle. [ 132 ]
The penny-farthing is a direct-drive bicycle, meaning the cranks and pedals are fixed directly to the hub. Instead of using gears to multiply the revolutions of the pedals, the driven wheel is enlarged so the radius from the hub to the outer wheel is comfortable for the rider to reach the pedals fixed to the hub. But the rider needs to be able ...
VAM is a parameter used in cycling as a measure of fitness and speed; it is useful for relatively objective comparisons of performances and estimating a rider's power output per kilogram of body mass, which is one of the most important qualities of a cyclist who competes in stage races and other mountainous [citation needed] events.