maddslacker is right it is mainly a roadie thing… I came from road racing 😀 . The hairs on your legs get ripped out as you slide on the dirt or asphalt… so by shaving you limit the pain from the hair and it makes clean up from crashes easier. the true reason road racers shave has to do with there massage pre and post race… most of us dont get that kind of service. hope this helps… shaving makes your legs look huge too!