The A-bike is a folding bicycle released by Sir Clive Sinclair in the United Kingdom on 12 July 2006. It was designed by Hong Kong design agency Daka, in collaboration with Sinclair Research, over a 5-year period. It was announced to the public in 2004. Clive Sinclair envisioned the A-bike, and Alex Kalogroulis was the main designer. It weighs 5.7 kilograms (13 lb) and folds to 67×30×16 centimetres (26.4×11.8×6.3 in), small enough to fit in a rucksack. The first version had 6-inch (15 cm) wheels, which was increased to 8 inches (20 cm) in later models. In 2015, an electric version, the A-Bike Electric, was introduced to the public as part of a Kickstarter campaign.
The A-bike was designed by Sinclair Research, in collaboration with Hong Kong design agency Daka, over a 5-year period. It was announced to the public in 2004. Clive Sinclair envisioned the A-bike, and Alex Kalogroulis was the main design engineer. It was released on 12 July 2006, and was priced at £199. The official Europe distributor, Mayhem UK, hoped to sell 25,000 units in the first 12 months. By 2007 it was being noted that a "large number of counterfeit" A-bikes were appearing in China and elsewhere.
In 2008 the Mark-II version was released: officially known as the A-Bike Plus. This version had strengthened aluminium tubing, a new air-sprung cushioned saddle, and an upgraded drive mechanism. The Mark-III version was released in 2010, and was officially known as the A-Bike City. The main changes were larger 8-inch (20 cm) wheels and it was priced at £299.99.
The A-bike is a small wheel bicycle with 6-inch (15 cm) wheels, increasing to 8 inches (20 cm) in later models. The original model weighs 5.7 kilograms (13 lb), and folds to 67×30×16 centimetres (26.4×11.8×6.3 in) reducing its volume to about 25% of its original size. A twin-chain system enables the bike to travel about 3.2 metres (10.5 ft) per crank rotation despite the bicycle's small-diameter wheels (6 inches or 15 centimetres). The crankcase housing almost completely encloses the drive mechanism, protecting it and preventing oil stains on clothing or floor surfaces.
The bicycle is more stable than it may seem by design, but it would be more stable if it had needle bearings on the steering axle, this is the true source of its perception of unmanageability but also the fact of mounting inverse the steering fork , due to manufacturing error, something not commonly perceived if the case.
In November 2006, A-bike was featured on UK television programme The Gadget Show, alongside the Strida. The distribution company behind the A-bike was featured on the UK Television programme Badger or Bust broadcast on 5 June 2007. In the Top Gear epic race Car vs. Train 2. Richard Hammond and James May carried A-bikes in their suitcases and unfolded them to bike from a ferry dock to a cable car.
In 2015, an electric version, the A-Bike Electric, was introduced to the public as part of a Kickstarter campaign. The design featured 8-inch wheels, as well as a larger seat and sturdier frame. The funding campaign was successful and production began before the end of the year.
- Sinclair Zike - Sinclair's earlier attempt at a portable electric bicycle
- Mini125 - a similar Italian-designed small-wheeled bicycle
- "Sir Clive launches folding bike". Bike Biz. 8 July 2004.
- "A-bike, no less". BBC News. 12 July 2006.
- "Bike unfolds to tackle the urban jungle". IOL. 13 July 2006.
- "Beware of counterfeit A-bikes". The Official A-bike Support Network. Archived from the original on 28 March 2010.
- "Sinclair A-Bike v Mobiky Genius". A to B Magazine. Retrieved 15 April 2016.
- "The A-Bike Plus (Mark-II)". Canadian Wind Rider. Archived from the original on 13 May 2016. Retrieved 15 April 2016.
- A-Bike & Strida Folding Bikes Tested - YouTube
- Lloyd Alter (21 July 2015), "A-Bike Electric is the smallest lightest folding e-bike ever," Treehugger. accessed 10 September 2015
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