This brings up a good point - if you're going to carry a gun while biking, you also need to be carrying ID + permit. I personally prefer to leave my wallet at home while biking, so if I was to start carrying a gun while biking, I'd actually need to increase the amount of gear on my person by more than just the gun/holster/etc. (I do wear a RoadID so if I end up in the hospital for some reason, they know my name, blood type, my one medication allergy, and have my wife's phone #.)