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I put up with the hassle of owning a car in traffic-jammed Washington, D.C., for a few years. But when I lost my free parking space, I sold the car and made a bike my primary means of transportation.

Kryptonite’s Modulus bike lock caught our eye at this week's iceBike show. It's being marketed as a flexible security system for riders who lock their bikes to various different sized objects, from ...