A radical new idea for bikes, No Chain! This “NuBike” uses two pedals on arms that stretch from the bike's rear hub and rotate a disk on the wheel for power. The builder says the mechanical advantages of Leverage, Gravity, and near-vertical pedaling, combined with the rider’s weight, produce an increase in continuous force throughout the pedal stroke. Rather than pedaling in a circular motion, straight-line vertical pedaling reduces excessive bending of the hips, knees, and ankles. The sleek carbon bike frame is very lightweight, with the bike weighing 18 pounds.
The prototype NuBike currently weighs 22 pounds (10 kg). However, the final commercial model is projected to weigh 18 pounds (8 kg) by incorporating changes such as replacing the aluminum levers with lighter magnesium ones.
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8 сен 2024
