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A teen on a minibike in Thailand. While the minibike had precursors in machines such as the Doodle Bug and Cushman Scooters, which share smaller wheels, tubular-steel frames, and air-cooled, single-cylinder engines, those vehicles had larger seat heights and lighting that allow them to be registered for road use as scooters.
A Doodle Bug scooter in the Crawford Auto-Aviation Museum The Doodle Bug was a motor scooter built from 1946 to 1948 [ 1 ] by the Beam Manufacturing Company [ 2 ] of Webster City, Iowa , US. [ 1 ] They were sold through the Gambles store chain to compete against Cushman scooters being sold under the Allstate brand by Sears . [ 2 ]
Original condition 1971 Rupp Roadster 2 mini bike in metallic purple. The year 1971 marked another set of changes to the Rupp line up. For the first time, 12" wire wheels were offered on bikes. The Roadster and Enduro were upgraded and a new model, the Black Widow, all came with the 12" wheels, either 24- or 28-spoke, the latter being rarer.
Minibike race at Lelystad (NL) Ivar training at Wilrijk (B) Jerowe at the Sutton track in Ontario, Canada Pocketbikes are small, two wheeled recreational vehicles approximately one-quarter the size of a regular motorcycles, and are powered by two-stroke internal combustion engines of between 40 and 50 cc. Pocketbikes maintain the look of full-sized sport bikes and are known outside of North ...
rattleCAD is a parametric 2D computer-aided design (CAD) software specific for bicycle design, [1] [2] in particular for design bicycle frame, [3] [4] developed by the Austrian cyclist and programmer Manfred Rosenberger since 2008. [5]
Wheelbase is a function of rear frame length, steering axis angle, and fork offset. It is similar to the term wheelbase used for automobiles and trains. Wheelbase has a major influence on the longitudinal stability of a bike, [ clarification needed ] along with the height of the center of mass of the combined bike and rider.