I am think you have it turned around. LT's can be run at lower psi

I think you have it turned around. I run my e-rated LT KM2's at 44psi and have worn perfect.
Where's JB. ? http://www.toyota-4runner.org/genera...-pressure.html

I did. But I still think 55 psi is crazy high

Yep. 55 psi in a 4Runner will rattle your teeth out. The tire shop set the tires at that psi and I could feel every pothole and rock...it was bad.

Through the years I have experimented with tire pressures on many LT and passenger tires for many different vehicles (SUVs, Pickups, motorcycles, hotrods, travel trailers). I demand a lot out of tires because of the way I drive. That said, I have found that using higher pressures (all within OEM specs) has provided better performance, mileage and still got the rated tread wear. For passenger tires (on 4500 to 5500 lbs 4x4 SUVs) I found 38 to 40 psi is best and with LTs 50 to 55 psi. Also each tire (model) will have their pros and cons. I have found that tire reviews by owners will give you a very good idea of each tires pros and cons. Not to push any one tire on anyone but the Michelin LTX MS2 LTs are in a class of their own (the passenger tire is also top rated). I'm running them at 55psi and they ride better (handling) and smoother then the OEM Passenger HPs. They weigh 15 lbs more and are and 1.5" bigger in diameter and still maintained the same gas mileage. I attribute that to the greenX rating and running them at 55 psi.

Try running the higher pressure for a couple weeks, you can always drop the pressure if you don't like it!

Koz

I get good mileage with my ltx m/s2's at the factory PSI (32psi or w/e)... i've gotten up to 10.9 L/100km highway, average 11.5 L/100km in the summer....

I agree 55psi seems high but alot depends on the tire and personal preference too. When I was running the 285/70/17 Duratracs I ran them at 50psi as the sidewall felt soft from what I was used to and the tread contact on the ground was still good at that psi.

Need to chalk them or just check your tread contact on the garage floor as you pull in the dry garage from wet and raining outside . If you have too much air in them you can actually see the outside lugs are not wearing.

That,personal road feel/comfort and if they are wearing uniform makes it so there is more then one absolute exact tire pressure IMO.I experiment with new tires to see what works for me and I could probably get better gas mileage running higher pressures but sacrifice comfort.44 psi seems to be my sweet spot with E rated KM2's.