Thread: Tyre pressures

Depending on the load I am carrying and the size of the corrugations I go down to 28-32psi on the dirt

Noticed recently the tyre placard says something like 28 front and 36 rear. The low front surprised me but was pleasing to see because I generally run 30 and 32 on bitumen at highway speed, and 5-6 psi lower at touring speed on dirt, and lower again on corries.

A lot depends on what tyres you are running.
With my Yokohama geolanders i couldnt go too low because they bulged quite a lot where my Mickey Thomson ATZ P3's dont bulge as much at the same pressures.
I usually just deflate untill there is a mild bulge and take note of the pressure and apply it to all 4 wheels on the dirt, Sand, Mud, Rocks and dirt require differant pressures so it is pretty much a case of suck it and see when i get a differant brand of tyres fitted

The low front pressures bring some stability into the handling of the vehicle. It gives it a bit of push. I think the whole load rating in the book for the vehicle is based around the standard tyres capablity rather than the vehicle itself. Never the less, you should be able to run your tyres pretty safely down to those pressures, I really wouldn't go under 28psi because you've already reduced grip at 28psi and don't want to further reduce grip, and you don't want to increase the risk of delamination which can be from culumlative damage. The rear of the D2 Td5 is about 100kg heavier than the front so will need higher pressures. Movement in the sidewalls of the rear tyres will also make it twitchy which is why the pressures are higher and increased even higher again as soon as you put any trailer on the back. I'm not going to recommend anybody to go below recommended pressures, but if you go your own way in the rear and it gets twitchy then you're too low - I have not been below 32psi. Im assuming that you have the Hankook Dynapro HP2 (not the AT) by the specifications, and that should be a relatively soft riding tyre already unlike the LT/offroad tyres.

I’m running 32 front & 38 rear (long range tank) in my 265 70 16LT’s. On the dirt I run 25 front 32 rear.

Since running 32 front the car handles much better. I won’t go back to the stupid 40 that the tyre shops insist on putting in it. They look st me funny when I say 32/38 please.

When you have to get new tyres and can upgrade to LT rated, we found this chart to be spot on for our fully laden D2 with 245/75/16 120 Load rated on dirt at 100kmh.
http://www.l8ter.com/wp-content/uplo...essure-pdf.jpg
See “Big 4WD”
ie tyre pressures COLD 20 front and 26 rear, warming up to 24 and 30.

Lovely ride with SLS and Konis, but you’ll need to run a bit higher pressures for general driving on bitumen for improved handling.

Just a FWIW I'm running 28F, 32R in 235/70-16 HT's.
The only thing in the rear atm is the fridge, drawers and a few spares.

Surprisingly reasonable tyre stability and ride quality.

Originally Posted by simonmelb

When you have to get new tyres and can upgrade to LT rated, we found this chart to be spot on for our fully laden D2 with 245/75/16 120 Load rated on dirt at 100kmh.
http://www.l8ter.com/wp-content/uplo...essure-pdf.jpg
See “Big 4WD”
ie tyre pressures COLD 20 front and 26 rear, warming up to 24 and 30.

Lovely ride with SLS and Konis, but you’ll need to run a bit higher pressures for general driving on bitumen for improved handling.

Don't ask about 18-20".... we dont know yet🤣🤣🤣🤣
Awesome picture good upload