The Kryptonite New York Fahgettaboutit Mini 18mm U-Lock is under $100 today. Originally $117, you can pick it up for 20 percent off thanks to Prime Day. Biking around a city makes life easier, but it’s infinitely more complicated when your ride gets stolen. A hardcore bike lock is a necessity if you leave your bike outside while you run errands, grab a bite or log hours at the office. This max performance lock has a double deadbolt with a protective vinyl coating and comes with three keys. The hardened steel eliminates bolt cutters as a threat, and the small size stymies pros with levers. Keep one key at home, another at the office and the third on your person at all times. Pro tip: Register your five-pound lock as soon as you get it, and get a secondary cable to protect your wheels.
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