I added a Tire Pressure Monitoring System (TPMS) to my 'C' after driving the last leg home from a trip. I checked all the tires before pulling out of the CG, but when I got home, the left rear inside dual had no air pressure. It did, however have a 10 penny nail in it. Somewhere in that last 300 miles, I picked it up. It could have happened pulling out of the CG or pulling into my garage. No damage to the MH or to the tires, although I replaced both tires. I didn't notice any difference in the way it handled, which is a scary thought.