gizmag.com — Almost thirty feet (9 metres) long, ten feet (3 metres) high and weighing 13 tonne, the "Monster Motorbike from Hell", is powered by a Detroit Diesel truck engine and six-speed Allison automatic and uses an Eaton differential from a road train to drive a massive chain on each side of the one-metre wide rear wheel that is from an 80 tonne Cat Loader