Tire Pressure Actual vs Sticker

There is heat build up in tires from driving. Causes increase in pressure.

Tires have maximum COLD psi.
What's the before driving pressure?



Look at a tire manufacturer sites.

They all state Under inflation is the top cause for tire failure.

I would leave it. but whatever you do, use a 5 foot extension when filling the tires at those pressures!

Front: 770, 760 kg. Rear: 1350, 1160 kg
Michelin chart says 45 psi front, 40 rear.
Ford sticker says 65 front, 60 rear
Tried 55, 50 but I think 60, 55 is the sweet spot for steering.

The difference is small enough and the nature of RV tires is such that it likely won't make much difference...

First: you gave the sticker weight, the sticker pressure,
The acutal weight and pressure

You did not give the recommended pressure for that weight (You get that from Mitchiln and be advised that the two ends of an axle may be DIFFERENT.. yup)

The proper pressure or perhaps a few (5) PSI more gives the best control under less than ideal conditions, a good ride and the best tread life.

RV tires almost never run out of tread (They run out of calendar life)

Slightly high si not an issue but I'd likely take 'em down to at least 100, if not 90.

I assume you have the Michelin XRV tires, I have the same. According to there charts you could run 80 front and rear. That assumes you don't add any weight because the numbers are real close, 85 might be better. You'll definitely have a softer ride and more contact with the road as mentioned.

Higher pressure also means a smaller contact patch, tire to road, and less traction at upper limits. Tire pressures get fine tuned for racing, you don't drive your RV at those limits except maybe an energency maneuver.

As long as you don't exceed the Maximum Inflation Pressure on the sidewall of the tire, you won't hurt it. Like Dutch_12078 says, a lower pressure may give you a better ride. Some vehicle manufacturers may specify a lower pressure to adjust vehicle handling characteristics.

Use your actual weights and the charts in this Michelin brochure

90 PSI all around would likely give you a little softer ride, but 105 wont hurt anything as long as your tread wear is even across each tire.