Let's face it: Bicycle riding—while not as overtly menacing as, say, motorcyles—can be a dangerous enterprise. If you ride your bike in the city you are constantly running the risk of getting hit by a car, facing a criminal case of crotch rash, or ruining your lungs. Add that to police crackdowns, and you've got serious physical and financial risks to consider before hopping on your fixed gear. It doesn't end there.