Sinclair Zike maximum speed of the bicycle operating under its own power was kept below 15 miles per hour to prevent it being classified as a motorcycle under UK law. The Sinclair Zike was developed by Sir Clive Sinclair following the commercial failure of the Sinclair C5 in 1985. Electric vehicles were one of his long-term research ambitions. The Zike was financed largely with his own money, and the manufacture was subcontracted to Tudor Webasto, a Birmingham-based company. The Zike was launched on 5 March 1992 at the Cyclex exhibition in Olympia, London, when a prototype was demonstrated to both press and
ZX81 consumer electronics". This and other disputes led to Sinclair resigning from Radionics in July 1979. While he was struggling with the NEB, Clive Sinclair turned to a "corporate lifeboat" in the shape of an existing corporate shell under his exclusive control – a company called Ablesdeal Ltd, which he had established in 1973 and later renamed Science of Cambridge. It became a vehicle through which he could pursue his own projects, free of the interference of the NEB. Despite his later success in the field, Sinclair saw computers as merely a means to an end. As he told the "Sunday