The U.S. isn't just making bottle cages and bespoke cycling caps—we can do high-tech, too. Just check out the Wisconsin headquarters of Cycle Ops, where workers painstakingly assemble hubs with incredibly miniscule high-tech strain gauges that are so sensitive they can calculate the wattage a rider puts into the pedals in real time, and communicate that data to a handlebar-mount readout you can download later. These sorts of metrics have become invaluable for racers in training. For example, you can bet that each and every one of the 192 riders that started this year's Tour de France trains with a power meter, and a good number of them ride on PowerTap-equipped wheels.