Originally Posted by Klbrown53
We have same unit and after first year I replaced tires with Maxxis D load rating which call for 65 psi. I also asked Discount Tire about extra pressure on wheels and they said no problem. But I do not know about 80 psi. I make sure and keep cold pressure at 60 or above. Had them replace stems with metal also. Funny thing happened when we got the cheap tires and rubber stems off. I no longer have to air them up every time I take it out and every two or three days when we are camping. Marathons were on my previous trailer and we had no trouble with them. Anything is better than the factory tires. I will never pull another RV off of a sales lot without tires that I trust on it. It just is not worth the worry I experienced that first year.
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Not sure why you went with LR-E but are not even running 65 psi which would be correct for LR-D.
It is the air pressure that carries the load not the tire. Also due to the suspension design, multi axle trailers place shear force loads that run 24% higher that the forces experienced on the TV.
If you Google "Interply Shear
" or "Interply Shear tires"you can learn more. If you aren't comfortable with the Techno-Babble then here is what you should do when pulling a multi axle TT to get the longest life from the tires.
Inflate the TT tires to their sidewall max, which for LR-E tires is 80 psi. In addition to reducing the shear force that is trying to tear the belts& tread off the body of the tire in each and every turn you will have much improved "Reserve Load". HERE
is a link to a few posts that mention "Reserve Load"
I write a blog on RV tire application and safety. RVTireSafety.com
Also give seminars on tires at RV events across the US. 40 years experience as tire design & quality engineer for major tire mfg. Freelander 23QB on Chevy chassis is my RV