Sinclair C5 major consumer organisations published sceptical evaluations. The Automobile Association questioned many of Sinclair's claims in a report published at the start of May. It found that the range of the vehicle was typically only about 10 miles (16 km) rather than the promised by Sinclair, and reported that the C5's battery ran flat after only on a cold day. The C5's running speed was more usually around than the claimed , while its running costs compared unfavourably to that of a petrol-driven Honda PX50 moped. The stability, general roadworthiness, and especially the safety of the C5 were questioned, and the
Sinclair Zike miniaturisation" but stated that "a quick test ride suggested the Zike is too unstable and lacking in power to make a cyclist feel secure on the nightmarish roads of London." Similarly Nik Berg for "Auto Express" noted that the Zike was lightweight and portable, but expressed concern about the lack of power and stated that "potholes should be avoided at all costs—the tiny wheels just get swallowed." Sinclair Zike The Zike, or Sinclair Zike, was a lightweight electric bicycle invented by Clive Sinclair and marketed by his company Sinclair Research Ltd in 1992. It was a commercial failure, selling only