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Probably ever since bicycles were first invented, people have been looking for alternatives to the traditional approach of pedalling in circles. Los Angeles-based inventor Rodger Parker has utilized one such alternative in his NuBike, which he claims is more efficient than a chain-drive bike. Along with its unique-looking carbon fiber frame, what really stands out on the NuBike are the levers that run from the pedals to a linkage on the rear hub. These allow riders to simply push up and down on the pedals, causing the rear wheel to turn. There are reportedly a number of advantages to this setup. First of all, as mentioned, it's claimed to be more efficient than a chain or belt-drive. According to Brown, because the levers are much longer than traditional cranks, riders are able to deliver more torque (and thus power) to the wheel for a given amount of effort. He also states that because the pedals just move vertically, riders can more effectively use the force of gravity to help push them do
