I have been running Michelin xps rib tires for ten years now. Before finding these tires I tried many different brand of tires. Everything I purchased seemed to go flat, disintegrate or blow out. Since I went to the ribs I haven't had a moment of trouble. I did have a flat, but that was a Schrader valve problem. If your just pulling your fiver to a local campground you probably don't need the rib tires, but if you are like us and roam all over North America the ribs certainly bring peace of mind.