Two-wheeler driven by muscular power

摘要

The invention relates to a two-wheeler which is driven by muscular power and in addition to the rear-wheel drive operated with the feet is provided with a front-wheel drive which can be operated by the hands. The front-wheel drive can comprise a crank mechanism which corresponds to the bottom-bracket bearing for the rear-wheel drive and is coupled to a front wheel of similar or identical construction to the rear wheel. The crank arms of the crank mechanism can simultaneously be used as the handlebars. For the purpose of improving the safety and stability of the two-wheeler, handlebars are additionally provided and a longitudinally adjustable support is arranged between the hub of the crank mechanism, which hub is attached to the handlebar stem, and the front-wheel fork.