This is slightly off topic, but why aren't folding bikes or scooters more popular? Their folding mechanism allows you to take them with you which would presumably prevent theft more than a lock. If a bike lock is the only thing that's keeping your bike from being stolen it doesn't seem like it'll work more than it just delays the inevitable.
Plus aren't locks really inconvenient to carry around with you? 10+ pounds is a lot when your bike is only 20lbs.
Plus aren't locks really inconvenient to carry around with you? 10+ pounds is a lot when your bike is only 20lbs.