Just started running a TPMS and I am a bit surprised at the increase in rear tire psi while underway. I would like to hear what others with similar SRW rigs are seeing.SRW, running 296-75-16 rated at 3950# (Scale weights of rig are under this). Rear tires set at 80pi cold. Did a quick 600 mi round trip this weekend, while underway psi climbed up to 97 psi. That is a good 20% increase from cold psi. As I have never run TPMS before, I don’t know if this is “normal” for SRW hauling heavy TC. I expected to see some increase in psi as tires heated up, was not expecting 20%.Front tires increased only ~ 10%, but on our rig the TC is weight neutral on front axle.Thx, Bill

With my 15 Ram 3500 only carrying 2,400#, I've seen my pressure go from 80psi to mid 90s. Back when I had my 04 Ram 3500 SRW hauling a 35' FW with a 1,600# pin weight, I left in the cool 65* morning with my tires at 80psi. After 5 hours of towing and the temps climbing to almost 100*, my PSI climbed to about 106psi with the tires measuring 115*.Just remember, never lower the PSI due to the increase from traveling. The PSI is to be checked when the tires are cold which means with less than 1 mile and before the sun shines on them.

The stock rear tires on our 2016 Ram 2500HD set cold at 80 psi run about 87 psi with a 2400 lb (loaded) Adventurer 80RB on board. This was observed traveling from Georgia to western Canada from mid May till early July. This was determined by the stock onboard EVIC readings.

Funny this thread came up, I'm always watching mine and always wondered what others see. My camper is 3,200 loaded on my SRW 2500 Sierra, my tires normally climb from 80 to the upper 80's or low 90's. Making a cold reading can really be odd to, when the temp drop to the 30's my tires are less than 80 psi cold, when in the 50's-60's in the morning they are around 80. You can also see a few pounds difference in the tire facing the sun in the afternoon.

Have new Michelin 295/70/18's (4080 lb. load rating) on our 3500 SRW. When loaded close to the RAWR the rear tires typically hover between 90-97 PSI while driving in ambient temps of 70-95 degrees (80 PSI at 7am or so before driving; ambient 60-65 deg). When temps eventually hit 105-110 degrees in the next month or so I suspect the rear tire pressure will easily surpass 100 PSI.

Pressure in my rear tires jumps from 80 up to 95 or so on a hot day running at highway speeds of about 65 mph. I set about 70 psi on the fronts and pressure jump to about 80 or so.

TPMS ? | Good Sam Community

MORSNOW
Navigator II
May 28, 2019
Funny this thread came up, I'm always watching mine and always wondered what others see. My camper is 3,200 loaded on my SRW 2500 Sierra, my tires normally climb from 80 to the upper 80's or low 90's. Making a cold reading can really be odd to, when the temp drop to the 30's my tires are less than 80 psi cold, when in the 50's-60's in the morning they are around 80. You can also see a few pounds difference in the tire facing the sun in the afternoon.
Travels_with_Yo
Explorer
May 28, 2019
The stock rear tires on our 2016 Ram 2500HD set cold at 80 psi run about 87 psi with a 2400 lb (loaded) Adventurer 80RB on board. This was observed traveling from Georgia to western Canada from mid May till early July. This was determined by the stock onboard EVIC readings.
kohldad
Explorer III
May 28, 2019
With my 15 Ram 3500 only carrying 2,400#, I've seen my pressure go from 80psi to mid 90s. Back when I had my 04 Ram 3500 SRW hauling a 35' FW with a 1,600# pin weight, I left in the cool 65* morning with my tires at 80psi. After 5 hours of towing and the temps climbing to almost 100*, my PSI climbed to about 106psi with the tires measuring 115*.

Just remember, never lower the PSI due to the increase from traveling. The PSI is to be checked when the tires are cold which means with less than 1 mile and before the sun shines on them.

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