Tyre Pressure for Pajero

Are they LT construction. I've just put on some ST's and they said to run them at 40psi on the blackstuff

36 sounds about right to me for the blacktop.

I Run mine at 36-38psi

HtH

I do 36 all round on the road for normal running

25 when playing at 4wd parks

20 on the beach.

I just do what works for me however 26/29 sounds really low for bitumen.

I use 36 front and 38 rear 'normal' but under full load I will increase rear to 40 on tarseal.

Dirt 26 front and rear 28 - maybe 30 depends on load

What tires size are they?

Russell

First of all, let me congratulate you on using everything but the right verion of 'They're' in your opening sentence. Quite an accomplishment!!!!!!

My Jackaroo recommends something like 32 psi front and rear in all conditions, loaded or unloaded. Even when unloaded, that pressure means the wheels screech going around normal main road corners, which is unacceptable.

My theory is that the manufacturers know that lower pressure on the road means a more comfortable ride and you do not feel as much of the little bumps like when going over man-hole covers. Hence the recommendations.

I think there is no way that the vehicle handles properly at those low pressures. We've got suspension to help iron out the bumps and having low-inflated tyres compromises handling in my opinion. Its also annoying and embarrassing when the wheels squeal around the corners.

I run mine at about 36-38 under normal road conditions. My tyre wear seems to be pretty consistent and even. I would have thought that driving around with your tyres at 29-32 psi would mean excess wearing on the outer edges.

Anyone out there run a full set at 38-40 (when vehicle manufacturers recommend much lower) and can comment on wear?

Anyway, IMHO what I'm saying is go with what makes you feel comfortable in the car. Keep an eye on wear patterns and that will give you an idea if they are too high or too low.

Russell you sound as excited as I was when I got my ST's.

However, I now regard their warranty with the same scepticism as I do the benefits of snake oil!
I wonder why the warranty only applies to purchasers in the metropolitan areas?
ST's are just what you need to negotiate Toorak Road.
Particularly as they use a red dust covered Leyland brother to promote said warranty, which by implication, suggests both usage & ownership Australia wide.
Both mine & my friends ST's are over 1/3 worn after only 13,000km & 14,000km respectively, with mainly highway usage.

Hi Russell,

Have 265/70R17 Cooper A/T's on the Prado and my tyre man said run them at 40psi on blacktop and maybe let them down to 25 or so on sand. Have been good so far (9500km).

Muddy 'doe

Hi Russell,
I have Cooper AT 265/75/16 LT's on my NM. Run them at 36 front, 34 rear and rotate as recommended. Increase to 38 front and 40 rear when loaded for a trip. So far have done about 18k and have yet to wear to the first step in the tread. Thats roughly 3~4 mm wear. New they have 13mm tread depth so thats about 1/3 worn. Hopefully I'll get around 60~70K out of them.

John

Gidday,I had a 4 runner with Coopers fitted and found that they were a little too hard in the compound.Doing a trip to the Kimberley I found that the tyres chipped quiet bad and when i got back to Mackay I had to replace them.On the dirt pressure set at 28 front rear 35 loaded.
Just my bit,
Locallaw

26psi is a flat tyre IMO. I run my desert dulers at 45psi all round when driving around town, that way I don't chop the tread off them in the city and I get MUCH better fuel economy. I'll leave them at 45psi until I hit rough gravel or any sort of 4wding when I adjust them accordingly.
The higher the pressure the less the steel flexs in the sidewalls so the cooler your tyres operate giving you less chance of a blow out. Especially important when running up north where the road surface temps can be extremley high and you are doing hours of loaded high speed driving.
Just think about it, what happens when you get a peice of metal and bend it backwards and forwards, it heats up then SNAP. That's what the sidewalls of your tyres are doing when they are bulding out, everytime a section gets to the bottom it flexes then straightens again on it's way back to the top. Make sense? Hope I havn't confused you.
But in saying that, when in the sand or on the beach etc, don't be scared to drop the pressures right down. I somtimes go as low as 10psi when fully loaded.

Russell,

I reckon if you look on the sidewall, the cold max. pressure will say 35psi. My last tyres were the same carcass but HT's. I found 29 at bit soft and the edges wore quickly, upped to 32 and this was much better, tyre placard suggested 29 all round.
My current tyres have a cold max. off 44, I run 34 which so far seems spot on.
These figures are for city based driving only.

Dean.

IMHO people inflate tyres to a high a pressure for no reason than someone told them they should or they heard they should without any back up figures. You have a choice.
(1) Inflate for comfort.
(2) Inflate for longevity.
(3) Inflate so its like riding a pogo stick. Really good for the back.

Again IMHO over inflated tyres are dangerous as you cut down on the tyre contact patch more than you do with underinflated tyres.

If you want to get really scientific about it then do this for normal road conditions.

Inflate your tyres to the manufacturers recommendation. Pick a spot on each tyre that can be readily identified. Measure the depth of tread with a depth micrometer gauge on the edges and centre. Go out and enjoy yourself for a couple of thousand kms and then measure the depths again. If the centre is worn more than the edges then the pressure is too high. If the edges are worn more than the centre then the pressure is too low. If the wear is even the pressure is OK.

I met a guy on one of our trips that said he gets over 100,000 out of a set of tyres doing this on a regular basis. Perhaps he should get a life?