Gregory Dunham (USA) has constructed a rideable motorcycle that is 3.429 m (11 ft 3 in) tall to the top of handlebars, 6.187 m (20 ft 4 in) long and weighs 2.948 tonnes (6,500 lb). It is powered by a 8.2 litre (502 cu in) V8 engine and has tyres that are 1.88 m (74 in) tall.