PSI when using higher load range tires.

TheOMB wrote:
Thanks for all the replies. I've been busy working and just drove from Nebraska to Maryland with my truck and travel trailer with 10,000 to 11,000 pounds loaded.

I decided to run 70 PSI cold and the ride seems better than at 65 PSI cold.

I did some research based on all the comments.

My wondering about PSI was sparked by the tire installer putting 80 PSI in the 3rd set of Goodyear Endurance E load range tires I've put on my trailer.

Without research I would have just deflated to 65 PSI cold like I've done with every tire I've had on the trailer since 2014. I learned sometime in my late 20's that my grandfather taught me wrong to air tires to PSI on tires. We air to the spec written on the door of auto... So that's what I've done with trailer but since I upgraded load range I wondered.

I found my rims could handle 80 PSI if needed.

The valve stem I could not figure out PSI but there likely good to 80 PSI. Every Valve Stem spec chart I read showed if stem could handle 65, it could also handle 80.

So... based on what Goodyear specs are, my likely weight and a few other things I've tried 70. For my next jump I'll try 65 and see if I feel the difference.

Thanks again for replies and hopefully this follow up post won't spark more debate :)

The debate is partly because you haven't provided enough info for an accurate recommendation and based on this post, you and your grandfather are still not actually correct when it comes to tire load/pressure.
Combine that with the inconsistent and somewhat unrealistic other "info" you've provided....
-Never even said tire size. I've gleaned, maybe incorrectly that they're 15" 225-75s likely? If 16" then wouldn't have been LR D in my experience. Totally different tires and the 15s SHOULD be near 80psi if your loaded weight is right. 16s you could run about 20psi less and still have capacity.
- 1st post, just upgraded from LR Ds. Last post, on your 3rd set of LR E Endurance tires...a tire that's only even been available for about 4 years now. Which is it?

If you can't even be consistent with the info you provide, you surely can't get the right answer to your questions unless purely by chance.

And the fact that you allude to putting mega miles on your trailer (and your website supports that assumption on my part), it also seems like you're looking for a solution or answer to a problem that doesn't exist.