GT Bicycles designs and manufactures road, mountain, and BMX bicycles. GT is a division of a Canadian conglomerate, Dorel Industries, which also markets Cannondale, Schwinn, Mongoose, IronHorse, Dyno, and RoadMaster bicycle brands; all manufactured in Asia.
GT was founded in 1979, by Gary Turner and Richard Long in Santa Ana, California, and was noted at its inception for spearheading the prominence of BMX bicycles, later for developing a range of bikes around its "triple triangle" design, and at the end of its independent history, winning a commission to manufacture a $30,000, 16lb. carbon fiber "Superbike" for the 1996 Summer games. GT sponsored numerous race teams and individuals, including noted riders Rebecca Twigg and Juli Furtado.
In 1998, the company went public and subsequently merged with Questor Partners, then owner of Schwinn. The conglomerate went bankrupt in 2001 and was acquired by Pacific Cycle, which was in turn acquired by Dorel Industries in 2004.
GT is noted for their "triple triangle" hard-tail frame design — where seat stays are parallel to the downtube and attached to the top tube forward of the seat tube, rather than directly at the seat tube. The company often uses a frame design where the bike's top tube extends rearward past the seat tube, claimed to reduce the vibration transferred to the seat from the rear wheel. Later versions would have "GT" stamped on the end of the extended top tube.