How Many Trailer Tires Do You Have? Tuson Trailer Tire Pressure Monitor! New technology just released, Space Balls or Tuson TPMS ball sensor for tire pressure and tire heat. No valve stems, just a ball that you slip inside your trailer tires and it transmits tire pressure and temperature to your cab monitor with the Tuson Trailer Tire Pressure Monitor. … Continue reading Tuson Trailer Tire Pressure Monitor