Community Forums

kamakalama · 12-13-2013, 09:54 PM

When we took delivery a couple weeks ago, all the tires were set at 80 psi. That seems kind of low to me.

We're driving the coach 140 miles on Monday. What is a good tire pressure to use temporarily until we get everything loaded up and to the scales?

millerj · 12-13-2013, 10:12 PM

Behind the driver seat near the floor on a small plate are the pressures recommended by Newmar. I used those until I had my coach weighed at each wheel position. At that point I adjusted the pressure to the actual weight of the coach. I now run 105 in the front and 90 in the back including the tag axle. Before the actual weighing of the motorhome I believe I was running the front at the 120 psi max and 85 in the back.

LVJ58 · 12-13-2013, 10:20 PM

If you have the 22.5" tires on your coach, and if it's a diesel pusher, 80psi sounds a bit low.

I would suggest having your coach weighed, then based on the weight on your axles, refer to the tire manufacturer's load inflation chart for the pressure recommended to support the weight on youur axles.

Until then you miight consider increasing your tire pressure by 10 to 15psi.

Good luck and safe travels....

"007" · 12-13-2013, 10:28 PM

I would follow millerj's advise for now than after you have your coach fully loaded get it weigh and follow the tire pressure tables for tires you have and weights you get loaded with your stuff not some one else's.
They can be found in QT's 1 & 2.

gruelens · 12-13-2013, 11:42 PM

Until you get each wheel position weighed and an inflation chart there is only one safe choice. That is inflating tires cold to the max. pressure indicated on the sidewall of the tire. Why take a chance on running underinflated/overloaded and damage a tire or worse. As soon as convenient, find a scales and adjust pressures to match inflation chart. All the best!

Chiefly1 · 12-14-2013, 12:35 AM

X2!

DutchStar38 · 12-14-2013, 01:42 PM

I run 105 in front and 95 in back.

stuhly · 12-14-2013, 01:56 PM

Between 95 and 105 would be safe anytime.

GaryKD · 12-14-2013, 05:29 PM

Hi kamakalama,
Assuming you have Michelin tires, what DutchStar38 and stuhly posted is a good PSI. I am at GAWR on the rear and have about 1K left on the front. I run 100-105 on the front and 90-95 on the rear.

JVR · 12-14-2013, 08:20 PM

Go to michelin's site enter your tire and weight per tire, dividing the axle by 2 of course and it provides the correct air pressure. Mine is 120 front and 105 rear and tag

Renden · 12-15-2013, 08:38 AM

Comment:

since this subject comes back often, it would be nice that the member posting gives us the Coach Model, and year and most important, the Tire size

.......

Snomas1 · 12-21-2013, 07:48 AM

I run 105 front and back. Never have had a problem in 10 years!!!

JVR · 12-21-2013, 09:14 AM

I would guess you're right on, I had a 2002 American Eagle and ran 105 all around, but that pressure won't cut it on the front of my Essex.

spinn · 12-21-2013, 10:27 AM

As recommended by others getting corner weights done is the best solution as it gives you an idea on how to load your coach. In the meantime the recommendations of 105-110 in front and 90-100 in the rear are probably pretty close.
Instead of running max tire pressure you might want to look at the weight loading chart that should be located on the wall behind the drivers seat. That chart will list maximum weight loadings on your axles, using those weights and your weight/inflation data from the tire charts should get you close (assuming your coach is not overloaded) without over inflating your tires excessively.

In some cases too much air can make your coach handling a little sensitive and of course impact proper tire wear, and we all no the dangers of under inflation.

Bottom line get your coach weighted, wheel weights best, axle weights next best.

Most of all travel safe!