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
Sinclair C5 production line remained closed permanently. On 19 September 1985, Sinclair Vehicles changed its name to TPD Limited, with a direct subsidiary named Sinclair Vehicles Sales Limited continuing to sell C5s. TPD only lasted until 15 October, when it was placed into receivership. The receivers announced that 4,500 C5s had been sold by Sinclair Vehicles, with another 4,500 remaining in the company's hands. £7.75 million was reportedly owed to creditors, of which £7 million was owed to Sir Clive Sinclair himself in reflection of his personal investment in the project. Hoover was not among the creditors, as Sinclair had managed to