stephen mills replied:

36 P S I !!

if you want resonable to good tyre mileage

steve

Narelle replied:

The Toyota dealership where I purchased our vehicle and also where its serviced suggest 40 psi. This was my first question as I checked the tyre pressures when I collected the car, and checked it against the recommendation but the service dept. reckon thats best, so there you go - another expert opinion.

Norm replied:

I have a Prado with 50,000km on the odometer.
Mostly done on road but also a number of weekends off road, inc. Land Cruiser club off road training, Madmans Territory Hill End, Sunny Corner-Sofala trip. I have run 34psi in them since brand new and they are still going strong.
A fellow trades person who I deal with owns a tyre shop and he also runs 34psi in his Prado tyres.

Peter Gordon replied:

An expert tyre fitter gave me some advise a while back. He said that the correct pressure for any tire on the road is cold pressure + 4-5psi (dont ask me to metricate that) after 1 hours running. It doesnt matter if you are on highway bitumen or dirt road. You just need to take some time and a lot of readings to form your own pattern. If for example your tyre pressure cold is 32psi front and rear and after 1 hour running on the highway pressures rise to 39psi front, 41psi rear, increase cold pressure to 35psi in the front, 37psi in the rear and repeat the check. This is tedious and time consuming but it will give you a range of tyre pressures for different conditions, road surfaces load carrying capacity, variations between front and rear tyres and the best handling, fuel economy and tyre life possible. Hope this helps, cheers Peter. ps let me know how you go

Fabian replied:

Having been thru 3 sets of various tyres, incl GrandTrek, the best pressure is between 34 and 36psi. I have run my tyres as low as 30 and as high as 40 on both offroad & highway conditions but 34-46 seems best as far as wear&tear are concerned. BTW, even onroad I have moved away Grandtrek as I find that when they are about halfworn, they slip around really badly. I have switched to Michelin 4x4 all 'round tyres and they are GREAT!