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The fitness and cadence of the rider, bicycle tire pressure and sizes, gear ratios, slope of the terrain affect the overall speed of the rider. A person pedalling with 100 W power can achieve 5.5 m/s on a roadster, 7.5 m/s on a racing bicycle, 10 m/s with a faired HPV and 14 m/s with an ultimate HPV.
A step of 7% corresponds to a 1-tooth change from a 14-tooth sprocket to a 15-tooth sprocket, while a step of 15% corresponds to a 2-tooth change from a 13-tooth sprocket to a 15-tooth sprocket. By contrast, car engines deliver power over a much larger range of speeds than cyclists' legs do, so relative differences of 30% or more are common for ...
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]).
Resting your nether region on a tiny triangle-shaped seat while you pedal for hours isn’t supposed to feel like lounging on the couch, but bike seat pain is usually a sign that your bike fit is off.
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In September 2009, the Union Cycliste Internationale (UCI), the governing body of pro cycling, voted to phase in a ban on the use of team radios in men's elite road racing. [15] Finally radio found its undisputed place in peloton for good and, as some races with imposed radio ban proved, the ban changed nothing in racing tactics.
Berberine, a plant compound traditionally used in herbal medicine, is today commonly stocked on the shelves of health food stores and pharmacies as a supplement.. Berberine supplements gained ...
In Citi Bike's first year, the majority of riders were male; women made a quarter of the trips and comprised a third of membership. [136] Citi Bike had 5.8 million annual trips in 2013, increasing to 8 million trips in 2014; 10 million in 2015; 14.1 million in 2016; 16.4 million in 2017; and 17.6 million in 2018. [137]
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