How much would you spend for an upgrade to smooth shifting on your next road bike? If $8,000 is in the ballpark, then Shimano-powered electronic shifters may be in your future. We took the cycling giant's latest gear for a spin in Central Park, drawing envious glances from various spandex-clad bikers during the ride. Outfitted with the company's newest Ultegra 6770 Di2 series of gears, the shifters gave us a taste of technology normally reserved for Tour de Francers -- at new, more affordable pricing. So what was it like to be the envy of cyclists everywhere? Jump past the break to find
