Sinclair Zike

The Zike, or Sinclair Zike, is 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 2,000 units while originally intended to be produced at the rate of 10,000 a month. It was ended six months after introduction.[1][2]

Sinclair Zike
A Sinclair Zike on display with a Sinclair C5 at the National Motor Museum, Beaulieu
Overview
ManufacturerSinclair Research
Production1992
AssemblyBirmingham, UK (Tudor Webasto Ltd)
Body and chassis
ClassBattery electric vehicle
LayoutBicycle
Powertrain
Electric motor100 W (0.13 hp)
Battery24 V nickel–cadmium battery
Dimensions
Wheelbase85 cm (33.5 in)
Length115 cm (45.3 in)
Height100 cm (39.4 in)
Kerb weight11 kg (24 lb)

Design

The Sinclair Zike is a portable bicycle with a small electric motor driving the rear wheel and with batteries built into its frame.[3] It weighs 11kg.[4] The batteries fit inside the central shaft together with the motor.[5] It uses nickel–cadmium batteries which have half the weight of the equivalent lead–acid batteries typical of 20th-century electric vehicles, and which can withstand 2000 recharging cycles.[4] A three-position throttle placed under the right handlebar varies the electric power and thus the amount of pedaling required to keep going, although the Zike has only one gear.[3][4] Battery life is said to be between 30 minutes and three hours depending on which of the three running speeds are used.[6] The batteries can be fully recharged by plugging them into the mains for just one hour,[4] and they are also recharged regeneratively using the energy from pedalling, freewheeling, and braking.[4][5] The 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.[6]

History

The Sinclair Zike was developed by Sir Clive Sinclair following the commercial failure of the Sinclair C5 in 1985.[5] Electric vehicles were one of his long-term research ambitions.[5] The Zike was financed largely with his own money,[5] and the manufacture was subcontracted to Tudor Webasto, a Birmingham-based company.[4]

The Zike was launched on 5 March 1992 at the Cyclex exhibition in Olympia, London, when a prototype was demonstrated to both press and public.[5][7] The price (mail order) was £499, comparable with a top of the range tourer or mountain bike at that time.[8] The initial production target was 10,000 Zikes a month.[4] In May 1993 press reports stated that Tudor Webasto had terminated production because of low sales and that Sinclair was seeking a new manufacturer.[8] In the end only around 2,000 units were sold.[9]

Sinclair himself moved on to the development of the Sinclair ZETA (Zero Emission Transport Accessory)—a detachable powerpack intended to sit on the wheel of any bicycle to help power it along.[9]

Sinclair put the failure of the Zike down to the business structure of the company manufacturing the bicycle. “We brought out the Zike and that had reasonable success but it hit a snag because the company that was making it for us, on a sub-contract basis, turned out to be a subsidiary of a German company and the German owners came in and closed the whole thing down. Very, very sad.”[10]

Reviews

The reviews for the Zike in the British press were somewhat negative (possibly in part due to memories of the C5 which preceded it). Susan Watts for The Independent called it "an impressive feat of 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."[4] 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."[3]

See also
  • A-bike - Sinclair's later development of folding bicycle technology

References
  1. "Faces of the week : Clive Sinclair". BBC News Online. BBC. 2003-08-08.
  2. "Remember the C5? The Zike?". The Times. July 13, 2006. Retrieved 15 December 2010.
  3. Berg, Nik (March 1992). "What's Sir Clive's New Zike like?". Auto Express.
  4. Watts, Susan (6 March 1992). "Sinclair peddles electric innovation". The Independent.
  5. Keegan, Victor (28 March 1992). "An electronic David gets on his Zike". The Guardian.
  6. Wise, Deborah (6 March 1992). "Zike ride raises a smile". The Guardian.
  7. "LBC/IRN: Sir Clive Sinclair on the Zike". British Universities Film & Video Council. Retrieved 13 April 2016.
  8. "Bicycles". Retail Business: UK market surveys - Issues 425-430. Economist Intelligence Unit. 1993. p. 55.
  9. Buchanan, Bill (2000). Computer Busses. CRC Press. p. 48. ISBN 1420041681.
  10. Coppinger, Rob (2 January 2018). "Archive interview — Sir Clive Sinclair, 2003". The Engineer. Retrieved 19 January 2018.
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