Sinclair Research worried that Clive Sinclair himself was using his own personal wealth to fund his inventions. By 1990 the company's entire staff had been reduced to just Sinclair himself, a salesman/administrator, and an R&D employee. By 1997 only Sinclair himself was working at his company. In 1992, the "Zike" electric bicycle was released, Sinclair's second attempt at changing people's means of transport. It had a maximum speed of , and was only available by mail order. Much like the C5, the "Zike" was a commercial failure, and sold only 2,000 units. In 1999 Sinclair released the world's smallest radio, in the
Personal public transport designated point within the coverage area. The user operates or directs, in an auto-drive vehicle, the vehicle to the destination versus this being done by a driver or conductor in traditional public transport options. Similar to traditional public transport options, the system is managed by a transit authority or private transport operator but the pricing model encourages users to return the vehicle quickly. Maximizing vehicle utility over revenue means operators seek revenue from other sources such as advertising, subsidy and system sponsorship. Personal public transport was conceptualized to explain the unique difference in service provided over traditional public transport options