I recently upgraded to a larger Travel Trailer so I upgraded from P to LT tires. On the camping forum that I frequent, I'm hearing that there may be a maximum psi for wheels. Does anyone know if this is correct and if so, where can I find the max. pressure rating for my stock 18" wheels.

 

Wheels don't get a PSI...tires do.. and you can find the MAX PSI rating for your tires on the sidewall.

 

Yep^^^

 

My alloy wheels seem to be weight rated, not psi.
But steel wheels, especially trailer wheels, can be psi rated as well weight rated.
Have been told that alloys can go to 80psi, but not all steel wheels.
Am currently running my Ford and Trailer alloys at 70psi without problem.

 

I get your question now...sorry Agree with Brulaz

 

Thanks for the replies so far.

The stock tires were P275/65R18 and the door sticker says 35 psi for those tires, but since I upgraded to LT tires, I'm told that 35 psi is too low?

My LTX M/S2 tires are LR-E so they can be inflated up to 80 psi but I don't know if the 18" alloys are OK up to 80 psi. I've been inflating them to about 65 psi when towing my travel trailer and not had any issues.

 

i think most guys here run their LT at 42-45 psi unloaded, some higher. 35 is probably too low, yes. There are conversion charts available too, linked somewhere here. or you can call the Michelin man, they can give you the proper numbers over the phone.

 

My HD Payload Package truck came with LT tires rated for 80 psi. Ford recommends 66 in the front and 60 in the rear. The rear axle is rated for 4,800 lb. So you are pretty close on tire pressure. Maybe a little high.

 

lt- c -rated...3rd year....40 front 40/44 rear....44 when trailer on...if I loaded more like the atv in the bed..48-50..

the pics are in this summers position for rotation..so front are rear last summer..

 

yes, 35psi is too low.
I have the same LTX MS/2 LT-Es you do, and Michelin said to run them at 48psi to achieve the same weight carrying rating that the original P rated tries had at 35psi.

But I prefer to run them higher, currently at 70psi on my Ford alloy 17" rims. Currently with 50K miles on them.