Poor ride on the E450 platform

Interesting information I found:
Using Michelin's chart for 225/75/16E

65 PSI Single (Front) equates to the GAWR of the 4600# front axle E450 used through 2007 (chassis year)
and
75PSI works out to GAWR of the 5000# axle used from 2008 up.

Many people including the dealer I bought mine from said to run max
all around. It rode hard and steered like on ice.

That should help until you can weigh it.

...I have a 28 Ft. Winnie and the recommended pressures ARE 65 and 80...

We had a much older Holiday Rambler. HR's recommended pressure on their door jamb sticker was less than what Ford showed on their sticker.

Nowadays, all the MH builder does is Quote, Duplicate, Parrot what Ford says, and those pressures are for the maximum GAWR for Front and Rear Axles.

If you want to load it down with watermelons, those are your pressures. If you want it to treat you as well as it can, Weigh it and Adjust Pressure accordingly.

quote....Air bags is just a patch and actually make the ride harder because there is no give in compressed air."

I disagree. Pulling my gooseneck trailer with my jeep,water, etc. inside and without adding air to the bags the truck would buck down the road, adding 35 pounds and smooth as silk. I have yet to find

the sweet spot on my Cambria.

dcooper67 wrote:

What should the tire pressures be with this load?
The coach is 26 ft.
Thanks again!

Check for a sticker on the door frame.....not from Ford but from the RV maker. Or look in your owner's manual. If you didn't get one, contact the RV maker for one. There is a LOT of good info. in there.

I have a 28 Ft. Winnie and the recommended pressures ARE 65 and 80.

It rides pretty much like a truck.....which is basically what it IS.

There are charts, but you'll need to provide front/rear axle weights and then the make/model of your tires first.

Thanks for all of the comments, I've come to the conclusion that my tires are over inflated. I carry very little stuff, 250 lbs max, plus my wife and I, not towing and have front - 65 and rear - 80. The coach only has 20k miles on it so I think the springs should be ok, probably could use some new shocks.
What should the tire pressures be with this load?
The coach is 26 ft.
Thanks again!

Oldme wrote:
Have you adjusted the tire pressure to the weight you actually carry?
That most likely will be different than your door sticker.

+1

I wouldn't say the E450 rides like a cloud, but it isn't that bad on normal roads. If it is bad the road is usually pretty beat up-well worse than average. I have a light class C on E450.

Have it weighed (front and rear) and set tire pressure based on weight. Don't blindly set it at 75 PSI, especially front.

My Coachman came from the factory with airbags to take the shock off of the spring suspension. But mine is a diesel so there may be a difference.

How much load do you have on the rear axle?

Is your RV new or used?

If you are getting a jaring from the back when you go over a harsh road it's the leaf springs shot. Mine was banging over bumps too.

Leaf springs are metal and metal fatigues. A good frame shop cab measure them for you no charge. To show you.

I replaced my leaf springs and 'added' a leaf. BIG BIG difference.

So many people add air bags etc etc. when it's the leaf springs that need to be replaced. Air bags is just a patch and actually make the ride harder because there is no give in compressed air.

Also lower tire pressure in the front. Keep back at manufacture specs.

After I replaced the leaf springs plus one the whole coach rides like a limo. Wouldn't trade it for anything.