curtwoodward writes "Nearly four years after the concept was introduced, MIT spinout Superpedestrian has started selling its $700 'Copenhagen wheel' kits that promise to turn any old bike into an electric-powered, smartphone-connected dynamo, simply by swapping out the back wheel. But they're not alone: a competing startup called FlyKly has already raised $700,000 worth of pre-orders for a similar device. Superpedestrian, which holds exclusive license to the MIT patents covering the Copenhagen wheel, clearly thinks there's some foul play going on. 'Their founder actually dropped by our lab at MIT a year and a half ago, saying he wants to collaborate, and spent quite some time with the Copenhagen wheel team. We'll leave it at that,' Superpedestrian founder Assaf Biderman said."