The most common question I get is "Is there a tire that I wont get a flat with?". The long and short of it is... Sadly no. When riding in big cities, your biggest adversary is going to be broken glass. When street sweepers clean, they often blow the debris from the middle of the road into cyclists path. Glass doesn't always cause an immediate flat, but instead works its way through your tire like a knife. The more bumps you go over, the more it digs into the rubber, eventually popping your tube. There isn't a flat proof tire or tube, but here are some really great ways to help prevent flats from happening.