I'm convinced there is basically no foolproof way to secure a bicycle in public.
I've seen everything from braided steel being cut clean to combination bike locks getting picked (by the attacker actually figuring out the correct combination, not just brute-forcing it apart or wangjangling a paperclip).
They just need to steal 1 good bicycle to more than pay off the cost of their equipment. One stolen bicycle could feed a family for a week. In some place like the Bay Area where $1000 bicycles abound, the economics are just too appealing.
I've seen everything from braided steel being cut clean to combination bike locks getting picked (by the attacker actually figuring out the correct combination, not just brute-forcing it apart or wangjangling a paperclip).
They just need to steal 1 good bicycle to more than pay off the cost of their equipment. One stolen bicycle could feed a family for a week. In some place like the Bay Area where $1000 bicycles abound, the economics are just too appealing.