Serious question, why does everyone say you need to carry a spare tube?
I was biking to my office in downtown Denver last month, about 8 blocks from my building, when I got a flat. I had my patch kit, but no spare tube. Everyone online says you're an idiot if you don't carry one. I sat on the curb, found the tiny hole in my tire, sanded it, put the glue on, and waited the full five minutes for it to dry like the instructions say. The patch held perfectly and I rode the rest of the way. A tube costs $8 and takes up space. For a simple puncture, a $2 patch kit works fine if you're not in a huge rush. Has anyone else just patched on the go and been fine, or am I really pushing my luck?