Xtracycle

For the defunct British auto maker see:Xtra (automobile)

Xtracycle is the name of a company and the name commonly used for the variety of load-carrying bicycle, a longtail or a longbike, that results from use of the company's products: the FreeRadical kit, complete long-frame bicycles and associated accessories. Web forums and blogs often use the shorthand Xtrabike, Xtra, or simply X to refer to either the FreeRadical extension or the entire extended bicycle. An Xtracycle may be constructed by modifying an existing bicycle with a Free Radical extension, or by custom-building an extended-tail bicycle frame.

While the Xtracycle is based on a standard hardtail diamond frame with 26-inch or 622 mm (700c) wheels, the Xtracycle differs from other load-carrying bicycles in that it does not employ a handlebar basket, panniers, or a bicycle trailer. Baskets are easy to attach and allow stowing of cargo in plain view. Panniers are often watertight or water resistant, and can be easily removed from their racks and carried as luggage. While trailers come in many designs and allow a bicycle to pull a significant amount of cargo, an Xtracycle allows for more stowage of large containers directly on the extended frame of the bicycle itself. Xtracycles are also called "sport utility bicycles" for their ability to carry larger loads than a normal bicycles having baskets or panniers, while also maintaining the "sporty" maneuverability of conventional "short" bikes.

The FreeRadical was conceived by Ross Evans at Stanford University and developed during his work in the mid-1990s managing a "Bikes Not Bombs" project in Nicaragua, where having a bicycle enhances a person's employment opportunities. In 1998 Evans and his friend Kipchoge Spencer created Xtracycle Inc to manufacture and market the invention, as well as a nonprofit organization, Worldbike, devoted to encourage a bicycle-centric lifestyle and culture.

Despite the fact that the FreeRadical qualifies as an aftermarket bike accessory, its growing acceptance has sparked an Xtracycle aftermarket not formally connected with Xtracycle Inc: varieties of specialized kickstands, electric-assist motors, and even bike-mounted blenders have come to market, even though each requires the prior purchase of a FreeRadical or other Xtracycle-compatible frame to function properly.

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Wikipedia