Tire pressure monitoring systems

I have the TireMinder Pro system for the 6 coach tires and the 4 toad tires. I received two bad sensors but the customer service was great and they sent me two new ones without any questions. They also are very helpful if I have questions. It has alarmed once but it was because we did not have the pressure set correctly. We check the tires visually each time we stop but the system provides great peace of mind. I recommend the TireMinder from Minder research.