Michelin Recommendations
I have a 2017 Coachmen Leprechaun 260DS which is on a 2017 Ford E450 chassis. The Motor Home came with Michelin Defender LTX - LT 225 x 75 x R16 tires. The door sticker calls for 75 PSI in the front and 80 (tire max) in the rear.
For what it is worth, I called Michelin's Motor Home tire department and they informed me:
1. Even if their chart of PSI by axle weight calls for less than the door jam - to go with the door jam.
2. Over inflating by 2 or 3 PSI (say 83 on a max 80 tire) due to the tire pressure guage imperfections is ok.
3. If the tires increase 15 PSI from cold pressure on a hot day, that is ok. Basically, as long as the max 80 PSI tires stay under 100 PSI when hot, it is not a problem. I notice that on a very hot summer day, the tires can heat up to 95 PSI from a cold pressure of 80 PSI (all as measured by the TPMS).
4. While I would never drive it, the max speed for these tires is 106.
5. Since tire temperatures will approximate the outside temperature, if driving out west in the summer with outside temps over 100, tire temperatures over 100 are ok. Just do not let the PSI exceed 100.
As I recall, the standard TST guidelines for when to alert you are (for an 80 max PSI tire) - 10% drop in PSI (i.e.; 72), a 20 - 25% increase in PSI (i.e.; 96 - 100), or a temp of 158 degrees F.
I hope this helps others - note that I can not speak to trailer tires.
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2017 Coachmen Leprechaun 260DS w/Banner, Luxury, recliners, double door refrigerator, 15K BTU A/C with Heat Pump, Camping Cozy Package, Big Foot Jacks.
Toad - 2016 Ford Edge SEL AWD w/6 cyl
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