What pressure do you run in your tyres ?

Are you setting these before you start? I find by using my TPMS that the pressure varies depending on the day temperature, if the sun is shining on one side or how long I have been driving for. I would like also to know how you can check the correct pressure on a gauge as I find many gauges vary, some up to four pounds psi.

Hi there Old Fellow, I have a good quality guage and have compared it to a cheaper one I have had for years and both read the same. Suprising when I have used the air at the servos and things and I have double checked with my guage and both have been the same which I find amazing but I am talking about the newer systems where you punch in the pressure you want so the guage obviously like the older style isnt getting dropped and ran over on the ground. Im am checking at a cold temperature so obviously if a hot day and loaded it will climb to about 42/43 (when I have checked them) but to be honest while pressures are important were not driving F1 cars or Touring Cars so a psi here or there is not going to kill a LT tyre or even standard OE tyres. I have never ever had an issue with flats,blowouts, uneven wear, excessive wear, tyres running off the rim due to the pressures I run. As said where I live which is full of twists and bends and roundabouts (Glenmore Park Sydney) for those who know the area is the reason I run a higher pressure but if I lived some where that didnt have all this crap I would still be up around 36/38. Ive had the hilux, vitaras prior, and later had 2 x 90 series prados one petrol one diesel and now have 120 petrol prado. Two previous prados,hilux,vitara's I ran BFG A/T's on all of them, the 120 I have now I run two sets of wheels, the original grantrecks for around town and muddies for off roading and both are set at 40. If extremely loaded some times I might even run the rear at 42 (depends on weight). But drop these down depending on roads, sand, dirt etc....Cheers Steve

Thanks Steve. I expect we are all, including me, getting a bit paranoid about tyre pressures. If you use the same tyre gauge and work on the four psi rule you can't go wrong. I run my Prado on the same basic pressures as you do and use BFG. ATs and have had no problems.
Cheers

Currently have 119000 kms out of a set of BFG A/Ts on our 2004 120 series Prado T/D Yes the tread is getting low but still enough tread to safely pass a roadworthy. Run at 36psi cold on black top, 25 psi on the rougher gravel and 15 psi on sand.
Will be getting the same tyres again.

Kimba 10,

Thanks, your driving conditions are certainly different to 80-90% country conditions.

The engineers set that tyre pressure to give a good ride. Its common among people selling cars to they drop the pressure to give the imprssion of a better ride. AS Steve said 40psi gives better tyres wear and economy, BUT my back not the best anymore so I have backed of to around 35 on blacktop and high 20s on normal dirt roads.
Cheers Pete

Fair enough. I have never run 40psi and get good mileage out of my tyres. I have 75k on a set of Geolander A/T-S running at 32psi with quite a bit left on them. I run 24psi on gravel. I think the can of worms picture is applicable :-) It boils down to being comfortable with the car and your driving style I think.

Mike My mechanic sets my tyres to 40psi every service, but I find now its to hard and does bring out the rattles.
Cheers Pete

Another consideration is that the Tyre Placard rating is for OEM tyres and many upgrade to various forms of off road and LT construction tyres that would have different ideal pressure requirements
Also once you have driven with a TPMS system and see how your tyre pressures fluctuate during the day I think the 4PSI rule is a bit simplistic but a good guide just the same.

The answer to such a simple question is complicated by many factors including the driver

Tony V,

Not hungry at moment tony, thanks for pics they say it all. Will show neighbour what the over inflated do. Cheers P&J

AlbyNSW I believe has hit the nail on the head.....if you are running OEM tyres which are almost always HT pattern tyres then the placard settings are about right for wear and comfort. When you fit an AT or MT pattern tyre then things change somewhat. You will soon get an adverse wear indication if centre or edges as per the pics if running the wrong pressure for the vehicle/tyre combination for too long.

Sean C2,

What are these Geolanders ? never heard of them out here, are they a new tyre on the market ?
Thanks for your tip of 36 psi. heated they would be around 40 psi on the Tar.

Cheers P&J

Geolanders are Yokohama tyres. The HT are crap in my opinion but the A/T-S are an extremely good all round tyre.

Thanks mikehzz, I just looked them up.

Hey P&J

As stated previous they are a Yokohama tyre and I have the AT-S version really comfy tyre on the road haven't had the chance to take them off road yet. I am heading out on a quick couple of day trip next so will let you know how they go.

When buying these my two choices were the Cooper AT3 and the geolander and from reading reports (many of explore oz) I decided to go with the geolanders.

lift your game JOL the link dozent work nick B.....LOL

http://www.direct4wd.com.au/tours/TYRE%20PRESSURE.htm

try this or copy and paste it,, cheers Jol

thats a bit hard for a ex A/S auto wrecker......Jol LOL

For 4wd tyres it is 6psi rule.

I run my patrol when not loaded at 30psi and raise to 35 when loaded then to 40psi on rear when towing the van and loaded.

You seem to know something the bloke who is the Western Australia state importer for Mickey Thompson/Coopers does not know.
Thats my last input because it really is a can of worms, you stick to six and Ill stick to four. Its worked for me for the last thirty years living up north here.

6 psi is for LT rated tyres - so much confusion.

Even then you'll find tyres on the sunny side are higher etc - it is a very rough rule of thumb at best, not the science some make it.

Question: are you talking cold or running pressure I.e hot !!!!