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The price of a new bicycle can range from US$50 to more than US$20,000 (the highest priced bike in the world is the custom Madone by Damien Hirst, sold at US$500,000 [10]), [11] depending on quality, type and weight (the most exotic road bicycles can weigh as little as 3.2 kg (7 lb) [12]).
The first steel bicycles weighed as much as 80 pounds, [5] whereas the lightest carbon fiber road bikes now can weigh as little as thirteen pounds. [ 6 ] On May 31, 1868, cycling officially became a sport with the first race occurring at Saint-Cloud Park in France . [ 7 ]
Some newer (2014/5) downhill bikes can be built to weigh under 30 lb (13.6 kg), such as the Trek Session 9.9 or Kona Supreme Operator. Dual crown e-bikes typically weigh 25–35 kg (55–77 lb). Adjustable head tube angles are also available to adapt the bike to the owner's preferred style of riding.
Reducing the weight of the bike + rider by 1 kg would increase speed by 0.01 m/s at 9 m/s on the flat (5 seconds in a 32 km/h (20 mph), 40-kilometre (25 mile) time trial). The same reduction on a 7% grade would be worth 0.04 m/s (90 kg bike + rider) to 0.07 m/s (65 kg bike + rider).
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Ozempic and Wegovy, made with the active ingredient semaglutide, are a class of drugs known as GLP-1 agonists, which help control your body’s response to insulin and reduce appetite by slowing ...