Thread: Tyre pressure

I am running 265/75/16 bighorns for mud but have taken off my front mudflaps to clear better. Only touch on highway height when on some lock and crossing gutters etc. On normal height dont touch even when flexed.

I'm surprised... 265/75R16 are 804mm OD or 31.65" in the old system.

When I put my spare set of 265/60R18 (775mm, 30.5") tyres/wheels on to my wife's stock P38, it rubbed when reversing/turning out of the driveway on highway height. If I was fast enough, it could just touch on standard height too Would probably have been fine if I trimmed the front mudflaps.

Based on my own experiences with a 2" lift kit and 255/85R16 KM2's (840mm, 33") I do still get an occasional rub on highway when reversing/turning out the driveway, with mudflaps removed. The real test is when you drop the car to the bump stops... it still moves forward and back on a flat surface, but don't turn the wheel by more than a touch! This is what I have to do when moving the car in or out of the garage with the roof racks on.

The KM2's are now my daily drivers and I am very happy with them. Think I am running 34psi at front and 36psi at rear... tyre wear is good after a few months. Drop them down to around 20psi for off-road play.

On pure road tyres like the 18" Cooper HT/plus or 16" Michelins on Wifey's P38, I run 36/38psi or 38/40psi.

Cheers, Paul.

The owners manual says 28 front 38 rear for all conditions, anyone run these pressures. I run 30f 35r and find that handling is good with no understeer.
Slightly softer front pressure definitely improves ride quality.

There are a few reasons they recommend 28/38, one supposedly to pre-load the viscous coupling, the other reason that they don't mention is that it sends more drive to the front wheels due to lower rolling diameter, hence the handling/cornering advantage!

Originally Posted by parasnoop67

The owners manual says 28 front 38 rear for all conditions, anyone run these pressures. I run 30f 35r and find that handling is good with no understeer.
Slightly softer front pressure definitely improves ride quality.

As Paul p38a, I used to run 38r 36f on my old 265 70 16 AT`s. Land Rover recommends 28 at the front for comfort, they dont care about wear.
As my new (ish) tyres are LT ( light truck) from what I have read they need to be higher pressures or they will wear more to the edges. I have set them the same as before for now to see how they go.

So would you say that it is recommended to run with the pressure as per manual? As I tried it once with improved ride, but fuel economy suffered a fair bit, I now run 34 front, 38 rears.