A tire pressure monitoring system similar to the one required on passenger cars would be a waste of time and money IMHO. Those systems don't alert you until the actual tire pressure drops to less than 75% of the cold tire inflation pressure recommended by the manufacturer of the vehicle.Jerry
Not exactly true for all cars........ My wife's 2007 Mustang GT500 works that way but it's older technology. All 3 of my newer Dodges, 2010 Challenger SRT8, 2012 Laramie Longhorn, and 2013 Durango Citadel not only warn you of a low tire but you can monitor the current pressure in all 4 tires at the same time by selecting that setting. My 2009 Kawi Concours 1400 also has factory TPMS that will give you the exact tire pressure reading both the front and rear tire simutaneously as well as a warning when the a tire is low. I liked it so much that I have my 2012 CVO SG set up that way via my Garmin 590LM by just screwing on their proprietary valve stem caps on my front and rear tires and synching it via the GPS's bluetooth. The advantage of this system is that I can program in the "normal" tire pressures and also program in the pressure at which I want to receive the warning as well as monitor the current tire pressure if desired. I can't remember how much extra the Garmin TPMS monitors were, but I think around $69 or $70 each on top of the cost of the GPS.