RV tires are a big deal. Take a look at any forum and you will see horror stories from people who have had blowouts. Making sure your RV tires are properly inflated is a must and doing this means you have to have a tire pressure gauge. It’s a snap to check tire pressure with this gauge. I confirmed we are at our desired pressure by having our coach weighed on the way home from our last trip and by looking up the recommended pressure for our load on the tire manufacturer’s tables.