Every bike rack is a buffet. You think a cable lock will keep your beloved wheels in your life. The thief knows a simple pair of aviation snips cuts through that cable like butter. You’re convinced a locker-style combination lock will outsmart a thief. He pops it in seconds with a shim—just slides it in between the body of the lock and its fishhook tip, and your bike is his. (A good thief can make a shim in about five minutes.) U-locks? Routinely opened with a pen jammed into the keyhole. Meanwhile bike components—the lights, seats, handlebars, derailleur, and brakes that turn a frame into a rideable bike—can go for hundreds of dollars each on the black market.