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In 1994, Steve Christini and Mike Dunn introduced a two-wheel drive option. [12] Their AWD system, aimed at mountain bikers, comprises an adapted differential that sends power to the front wheel once the rear begins to slip. In the late 1990s, 2WD 'Dual Power' mountain bikes were sold in Germany under the Subaru name. They used one belt to ...
A two-wheel-drive bicycle with the front wheel propelled by the arms and the rear wheel by the legs (demonstrated by its Dutch inventor on Polygoon, 1942). For two-wheeled vehicles such as motorcycles and bicycles, the term is used to describe vehicles that can power the front as well as the back wheel.
Some two-wheeled designs had pedals mounted on the front wheel, while three- and four-wheeled designs sometimes used treadles and levers to drive the rear wheels. The earliest usable and much-copied velocipede was created by the German Karl Drais and called a Laufmaschine (German for "running machine"), which he first rode on June 12, 1817.
Most velomobiles drive the rear wheel(s). This approach is simple and can often use many standard bicycle parts. Velomobiles with two rear wheels may drive just one wheel, or may drive both. Driving a single wheel is the simplest and lightest approach. Driving both wheels can improve traction but also increases complexity, cost, and weight.
Rokon was founded in Vermont by Orla Larsen in 1963 to sell the Nethercutt Trail-Breaker, a two-wheel-drive motorcycle invented around 1958 by Charlie Fehn and built in Sylmar, California. In 1964, Rokon Inc. bought the manufacturing rights to the Trail-Breaker and marketed the bikes from their Vermont office before moving the business to New ...
A motorized bicycle is a bicycle with an motor or engine and transmission used either to power the vehicle unassisted, or to assist with pedalling. Since it sometimes retains both pedals and a discrete connected drive for rider-powered propulsion, the motorized bicycle is in technical terms a true bicycle, albeit a power-assisted one.
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