Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 11, 2025 ...

Tom,

I bought a TST system for my SOB. The weight of the sensors on the stems caused grommets to fail on two tires. The grommets were probably a few years old. The system was not reliable in subfreezing temperatures. The system is all in a box somewhere in my home. I currently check tires with a gauge, a 1/2" break over driver (wrench for thumping), and an IR thermometer.

The FT came with Pressure Pro on the coach and toad. The toad flatted one tire twice during the few days I was inspecting the coach and toad. After we removed the PP, the toad never flatted again.

Immediately after we bought the FT, we purchased new tires. Herman Power tire company put the PP sensors on the new tires. One of the new tires flatted before we picked up the coach. We removed the PP and it is in a box somewhere on my premises. Tire pressures have remained consistent for 16 months as measured with a dial gauge. There is a drop of about 1 psi/month, but the biggest changes are due to seasonal changes in ambient temperatures.

From what I have read and from my experience, losing about 1 psi/month is normal. The air we breathe is about 78% nitrogen. I would not expect "filling with nitrogen" to provide any benefits other than psychological. That is strictly my opinion, other opinions are likely to be different. Sellers of nitrogen filling system would definitely tell a different story. My opinion is based on experience and what I learned about gasses in science classes.

I especially check pressures when ambient temperatures are low. I check during the coldest part of the day when the coach has not moved for several hours. I make sure that my tire pressures meet minimum "cold" requirements according to manufacturer's recommendations for axle weight.

As always, opinions and recommendations will vary

One thing I do when I remove the Pressure Pro and put it back on I put the stuff(?) that came with the unit on the stem.  I think it is to keep the pressure pro from sticking to the stem.  I have not lost air from using the pressure pros so far.  Herman Powers also installed my tires and before I put the pressure pro on the tires I had a flat.  Powers came and put in a new stem.  So far so good.  DAN

Tom,

I have Pressure Pros but would not buy them again.  Yes, they have saved us some serious losses and for that we are truly grateful.  But there are now better systems on the market.  What I did was buy a very good quality tire gauge.  I think it was around $30 and was made in America.  I had Discount tires check the accuracy of the gauge and it was dead on the mark.  Next I took the Pressure Pro monitor reading for each tire and checked it against my gauge.  This takes patience and time to do.  Keep in mind that the time of day and the ambient temperature will give you different readings -- especially from sunny side to shady side of your coach.  I found that there is a 3 psi difference between the Pressure Pro monitor and my gauge.  So now while I can feel comfortable reading the PP monitor, I rely on my gauge to fill to the target pressure. 

Hope this helps.

I am thinking of getting a tire pressure monitoring system (TPMS) and want to know which brands and models are good or bad.

Do you use just the TPMS alone to monitor the tires,  or do you still use a tire gauge to check pressures?

I find my tire pressures are down a couple of psi every two or three months, and don't know if this is seepage or loss due to my taking pressure readings.  If it is from seepage, I wonder if using nitrogen gas instead of air would help.

Well, after all this talk about pressure pro not reading correctly I decided to ck. You are correct The gauge saids 100 and the pro saids 92. They all read a little different than the gauge. I just got a new quality truck gauge so it should be correct. When the tires get hot the pro indicates about a 10 psi increase. Thats ok as long as it always reads what it thinks the tire psi is. But u need to know the definition of the word"is" is.

I don't use a tire monitoring system so I can't speak to their advantages.  But I do have a good tire gauge with a 180 Degree head on it so that I can easily reach the inboard tire stems.  As an accuracy check I periodically run by a tire store that I have used for years and check my gauge against their calibrated one.  They tell me that their corporate folks require monthly calibration so that is good enough for me.
Gary B
( I have found that my gauge reads 2 pound high compared to theirs. )