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Yoda: I was just guessing 30 psi, maybe not that low... but plan on testing lower PSI values just to check.
When I drive on east coast it seems everyone drives faster than Chicagoans.
I have the 285/65R18s E-Rated KO2s on my stock 2016 wheels. I did not notice any difference in noise. (I am much more likely to notice wind noise - especially with my roof rack on.) As for mileage, again not enough to notice. I love the ride. I run them at 40 though I must admit that with the temps having (finally) dropped here in the Denver area the tires read 38 PSI first thing in the morning. (Temps in my garage at that time have been in the mid-30's.) I haven't bothered with adding a couple PSI because if it does snow I tend to want to have them a bit softer.
Yes, the 65's are about an inch more in diameter. This was not for looks (not important to me) but it does give me another half inch of lift while still having a comfortable fit. (When it becomes time to replace the shocks I will likely do a modest lift.)
I have not yet been able to test them in snow but the KO2s I had on my LR4 worked out great over the winter here in CO.
Yoda: I was just guessing 30 psi, maybe not that low... but plan on testing lower PSI values just to check.
When I drive on east coast it seems everyone drives faster than Chicagoans.
@gaijinThe lowest cold tire inflation pressure recommended for the LT285/70-17 tires under any circumstances, for any vehicle, by either the manufacturer or the Tire and Rim Association, is 35psi.
The lowest safe cold tire inflation pressure for use on the Land Cruiser is 40psi.
Obviously, purposely temporarily "airing down" for short term offroad use is not included in either of the two above.
For on road use, running less than 40psi on your rig opens you up to the possibility of tire failure and/or vehicle instability/rollover.
Again, obviously, I'm not saying your going to self-destruct if you run 38psi; but I am saying you would be operating outside the safe envelope of recommended tire pressures and increase your odds of misfortune.
You'll run whatever tire pressure you want, and that's up to you, of course. I'm just trying to let you know that there are engineers far more knowledgeable than both of us who have decided that on rigs like our Land Cruisers, anything lower than 40psi is not recommended - especially at high speeds.
HTH
I have rw with 285/70/17, noticeable decrease in braking, acceleration and a small hit (1-2mpg) in fuel economy. If you are going load range e, I think a little more sidewall would soften the ride some. Stock size LT tires will require min 46 psi and would be a little rougher I'm guessing.
View attachment 1359700 Are you running a lift with your RW rims, I picked these up today and would like to go to a 285 70 17 but am concerned it will look stupid because I do not have a lift.
View attachment 1359700 Are you running a lift with your RW rims, I picked these up today and would like to go to a 285 70 17 but am concerned it will look stupid because I do not have a lift.
So the PSI for the "60's" is 46 and the PSI for the "65's" is 42, right? I would have thought the taller tire (65) might need more than the "shorter".
Where are you guys getting these tire pressure recommendations from?
I don't understand why their figures are so much higher than Toyota's recommended tire pressure. The recommendation from Toyota for the OEM tires is 33 psi.From the Yearbook published by the Tire and Rim Association, Inc.: The Tire and Rim Association, Inc.
HTH
Totally different tires, Stock are P-metric, KO2's are LT tires, different construction and load requirements.
From what I could tell, LT tires need more PSI to carry the load.