2013 E450 max psi in stock wheels

I don't recommend exceeding 80 psi on the factory Ford/Alcoa aluminum wheels. They will not take the overloading. I cracked both of my rears. The steel wheels seem to be okay, since when they fail they just bend. For typical motorhome use, I think this is unlikely.

I did a lot of research what rim makers say is the number states pressure rim bead on tire will support if you change tire to a larger load the bead will hold more air pressure. Buy the wa m rear tires are 235-85/16 and I been running 100 PSI for 6 year never a blow out ,yes it does ride harder and each tire can hold 1,000 pounds extra per tire they are load range G money wiell spent.

rivercity22 wrote:
Shouldn't you use the PSI that is on the sticker in your door jam, I've always been told the ratings on the tire is just a recommendation as the tire manufacturers don't know exactly what kind of vehicle the tires will be used on.

Using the door jamb sticker works fine for cars but the chassis manufacturer put that sticker on there when it was a stripped chassis. The stripped chassis manufacturer doesn't know what the weight of the finished product is.

At 9,960# aren't you 360# over the 9,600# rear axle rating? It looks like an issue to take up with Nexus.

rondi wrote:
The only 16" tire listed is the XPS Rib which is a steel belted tire, vs the LTX fabric belted.

Below is the website link for Michelin's 16 inch LTX M/S2 tire.

The M/S2 is a steel belted tire in the tread area. The XPS Rib has steel in the sidewalls too - which the M/S2 does not. The XPS Rib has a fairly smooth highway tread, while the M/S2 of course has a more aggressive "Mud & Snow" tread (while still carrying a superb 70,000 mile treadwear warranty):

http://www.michelinman.com/tire-selector/category/light-truck/ltx-m-s2/tire-details#tire_highlights

I'm the OP. Our rig is a 2014 Nexus Viper 29V, 30' class c on a 2013 E450. Our rear axle weighed 9960 lbs on the scales packed for a weekend trip, full gas, 10gal fresh water, empty dump tanks. My tires are Michelin LTX m/s2 LT225/75R16/E 115 rated for 2470 @80psi (max psi) each on the rear duallys--I'm 80lbs overweight on the tires--not the axle spec. I have also had 2 leaves added to the rear spring pack to raise the rear and and increase the carrying capacity of the springs.

I can't use a wider tire because the offset is not enough and the duallys would rub. I have ordered Hankook F19 7.50R16LT which is very slightly narrower than my 225's and is a load range G tire at 100psi. At 90psi duals are rated at 2630lbs/tire which is 10520lbs for the axle--which I will not need--as ksg5000 mentions, I would use the load/inflation table for the F19.

The Accuride catalog sez--the 16x6 light truck wheel is rated at 80psi max. I have looked at the outside dual, and the front wheel and nothing that resembles a "Max psi" is stamped on the wheel. My local Ford parts guy could not find anything is his computer which had that spec either. I have requested that info from Ford CS last week, but no reply yet.

You'all are correct for the tires installed, the psi on the sticker is correct. Others on this and other forums have installed 17.5" tires to get safer margins--I choose to give these Hankooks a try. If you notice on the RV section of Michelin tires--the LTX tires is not even listed. The only 16" tire listed is the XPS Rib which is a steel belted tire, vs the LTX fabric belted.

Thanks for all the replies,
Ron

Whether you upgrade the tires or not the actual tire pressure should be based on the weight of the rig rather than the max pressure of the new tire. If you don't know the weight of the rig then check the door panel which usually will indicate the recommended tire pressure - stick with that.

Shouldn't you use the PSI that is on the sticker in your door jam, I've always been told the ratings on the tire is just a recommendation as the tire manufacturers don't know exactly what kind of vehicle the tires will be used on.

My 2002 F-450 rims are marked"80 PSI max"

There is info in here about wheel identification and also max PSI listings for various wheels:

http://www.accuridewheelendsolutions.com/files/2012/09/Accuride-Wheels-Product-Catalog-Summer-2011.pdf

http://www.accuridewheelendsolutions.com/