Originally Posted by Ya Tu Sabes
During all my years riding in NYC, I kept a spare tube strapped to the underside of the saddle with a toe clip strap and it never got jacked. I wouldn't leave valuable tools on the rig, but the tube itself seemed to have no appeal to the criminal element. As for patching vs. replacing, I join the rev: replacing is quicker, and you can save the busted tube for a subsequent patch job. Anyway, sometimes it's too hard to find the puncture on the street - if it's dark out, you can't see it, and if it's noisy you can't hear it, and if it's windy, you can't feel it.
Sometimes, if you're having trouble, you can pump the tube up and run it past your nose and
smell where the leaky puncture is located. Seriously.