For years, riding a recumbent was like wearing a day-glo T-shirt with GEEK written on it, front and back. But just as Palm Pilots and headset cell phones were total geekware not so long ago, recumbents are now fairly commonplace. One of the fastest-growing segments of the bicycle market, recumbents just get better and better: Once heavy, cumbersome, poorly spec'd and very expensive, they are now sleek, light, have great components and affordable.