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  2. Bicycle and motorcycle dynamics - Wikipedia

    en.wikipedia.org/wiki/Bicycle_and_motorcycle...

    For example, a motorcycle with a 12 inch wide rear tire will have t = 6 inches. If the combined bike and rider center of mass is at a height of 26 inches, then a 25° lean must be increased by 7.28°: a nearly 30% increase. If the tires are only 6 inches wide, then the lean angle increase is only 3.16°, just under half.

  3. Balance bike - Wikipedia

    en.wikipedia.org/wiki/Balance_bike

    A wooden balance bike. A balance bike (or run bike) is a bicycle without pedals that learners propel by pushing their feet against the ground. [1] By allowing children to focus on developing their sense of balance and coordination before introducing pedalling, balance bikes enable independent riding more quickly than training wheels.

  4. Bicycle performance - Wikipedia

    en.wikipedia.org/wiki/Bicycle_performance

    According to a study a human at 70 kg (150 lb) requires about 60 watts to walk at 5 km/h (3.1 mph) on firm and flat ground, [6] while according to a calculator at kreuzotter.de the same person and power output on an ordinary bicycle will travel at 15 km/h (9.3 mph), [7] so in these conditions the energy expenditure of cycling is about one-third ...

  5. Bicycle - Wikipedia

    en.wikipedia.org/wiki/Bicycle

    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 ...

  6. Cycling - Wikipedia

    en.wikipedia.org/wiki/Cycling

    European city bike Children riding a bike in Ghana. Cycling, [1] also known as bicycling [2] or biking, [3] is the activity of riding a bicycle or other type of cycle. It encompasses the use of human-powered vehicles such as balance bikes, unicycles, tricycles, and quadricycles.

  7. A 70-year-old lost 70 pounds and got into weightlifting. She ...

    www.aol.com/news/70-old-lost-70-pounds-094702226...

    The 70-year-old, who stood at 5-foot-3, weighed 200 pounds after years of mindless snacking and was on blood-pressure medication. MacDonald told Business Insider she bowled and played darts and ...

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