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Why is it so light?

The Frame Materials

Heat treated aluminum and high strength glass fibre reinforced engineering polymer constitute the majority of the frame.

The Twin Chain
The twin chain gearing system specifically uses small drive axles, often one of the heaviest parts of a traditional bicycle. Pedal cadence remains the same as a normal

The Wheels
Each weighs only 350g and this includes the pneumatic tyres which give such a smooth and comfortable ride.

The Brakes
Designed specifically for the A-bike, the semi circular band brakes fit the wheel perfectly providing a lightweight and robust alternative to traditional shoe brakes.

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How Does it Fold? Why is it so Light? Sinclair Research Tech Spec