Not surprising Michelin recommends a minimum 50 PSI. I have never seen a tire maker recommend anything less. Some people run less than 50 in their 'E' rated tires to achieve a smoother ride, but that is not recommended because of excess heat buildup due to underinflating.
And yet, Jeep put E rated tires on my '06 Rubicon at the factory(for side-wall strength, not load capacity), at an inflation pressure of 33 PSI.
I made several long distance trips on those tires, at freeway speeds of 70 to 75 MPH, with no tire problems at all!
When off-roading at low speeds, I would air them down to 12 to 15 PSI, and run all day over the rocks. No trouble there, either. As soon as we got back to a "real road", the tires were aired back to the recommended 33 PSI.
CM1, USN (RET)
2002 Fleetwood Southwind 32V, Ford V10
Toad: 2006 Jeep Rubicon LJ
Other toad: '06 PT Cruiser, Kar Kaddy dolly
Toy: 1977 Dodge W100 CC SWB, 3/4 ton axles & springs
"When seconds count, help is only minutes away!"
I replaced my tires in January to Khumo RoadVenture SAT KL61 113s 265/70r/17
Max Load 2535lbs
Max Psi 51
They run great, very smooth,When towing pump them to 51 psi. When I am not Towing they are at 40psi
You don't need LT tires on your truck for that trailer.
Theunis,Karen and 2 adult daughters
07 CC Silverado Classic 1500 Z71 5.3l 4.10axle
HD tow package
09 Jayco 23B HTT