By Cat DiStasio, Inhabitat Staff
These days, many people prefer two wheels to four. Folks opt for bikes instead of cars for the exercise, the maneuverability, the low environmental impact and the camaraderie among riders. It's the ever-changing design of bikes that grabs the world's attention, including those of us who aren't so steady on two wheels. Whether you're a diehard cyclist or you're skeptical of human-powered transportation, here are six incredible cycles that will leave you thinking bikes are a superior class of vehicle.