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 lengths of time. Some car sharing systems are also examples of PPT. Personal public transport Personal public transport (PPT) is a network of vehicles distributed throughout an area and available to the general public in such a way that each user has the ability to determine the route and schedule on a self-service basis. The design of a PPT system encourages utility (usually trips) over revenue. While most public transport systems operate on specific routes with set timetables, PPT systems utilize a network of vehicles at various locations for users when they desire them, allowing those users to take any