I have a mountain bike with knobby tires and thought it would help me avoid flats. But riding in the desert with tumble weeds and other sharp needle like plants are killing me and I’m not enjoying ridding anymore. Many years ago I bought my son "puncture-resistant" tires and even they got flats although not as often. I could take the bike to the beach and probably never get a flat, but it’s a really long way from home driving in unbelievable traffic.