A-Bike - Folding Bicycle by Daka Design
The A-bike is a revolutionary new folding bicycle that breaks new ground in the areas of weight, folded size and design. Weighing in at just 5.5 kg, this ultra-portable folding bicycle is the lightest in its class. By utilizing quick release clamps, fold and unfold only takes 10 seconds. Its key advantage is true portability. It can be easily carried on public transportation network, and its compact size allows for easy storage. The A-bike can attain normal speeds without having to pedal any faster than with an average large wheel bike. Another key selling point is the totally enclosed chain system. A commuter does not need to worry about dirty trouser cuffs when riding as all the greasy parts are concealed.
Design: Daka Design
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Obviously the guy who did this concept has no idea of fisics.
A bike with those small wheels would need an amazing speed to keep upright.
Its not the same like a skate cuz in a bike the centrum of gravity is much more raised.
So once again, noone would pedal fast enaugh for this conzept.
Numerous videos of people riding the A-bike quite well, exist on Youtube, The only problem i see is when someone rides uphill, the riders weight is shifted back because of the short top tube length, and the small seat. This in turn would cause a wheelie, but no problem with balancing the bike side to side.
The link is not working; should be: http://www.daka.com.hk/
the bicicle is amazing!