Thread: Tyre pressure's

thanks baz youre a champ i put these new tyres on and bloody hell they are all at 40 and it feels way too harsh, youre a champ for giving all your advice.

Originally Posted by Tank

Numpty, when you hit the brakes weight is transferred to the front wheels, depending on how hard you brake, Regards Frank.

This happens whether you are loaded or not!!!

Originally Posted by Ken

As you travel down the road the tyre gets hot and expands if your running to greater difference in the front to rear tyres you get difference in tyre pressures that dramatically changes the steering caracteristics of the vehicle
ie sidewall stifness
compound gets hotter
uneven grip
rolling resistance

Not arguing, but I have never experienced this. But then when we are on holidays we probably drive in a little more relaxed state than some. ie I am not a speeder in the Land Rover.

Originally Posted by Redback

I've tried all sorts of recommended pressures from mates to the tyre retailers who (and i mean all of them) say 40psi all round

I run 30 front and 38 rear around town (no load)

I run 30 front and 46 rear loaded (that includes camper)

I run 26 all round offroad (no load)

I adjust for handling when loaded offroad with the camper on but around 26 to 30 in the rear and 26 front.

Tyre placards recommendations for the D2

28psi front and 38 rear (no load)

28psi front and 46psi rear (loaded)

The recommendations on the tyre placard are a good place to start from.

Baz.

Although I run different pressures in the Defender than you in your Disco Baz, I tend to agree re the balance between front and rear. I also lower pressures on gravel roads and also reduce speed.

I have run 36 all round in BUB91, two sets of tyres worn out perfectly.

On the subject of tyres, I've been running BFG A/Ts on my D1 for the last 25000 kms and I like them.They do tend to hold noisy little bits of blue metal though. I've already had them rotated once. Scored a gyprock screw in the rear second day after I got them, however the patch job has held up well. Anybody know what the recommended rotation interval should be ? Interesting point why the front should have more pressure than the rear.Cheers adaminaby

I was once informed that you have the correct starting pressure (road use) when the pressure difference from hot to cold is 4psi

ie if you have inflated to 28psi when cold, and the tyres read 32psi when hot, then you have the optimum pressure for your vehicle.

Personally, I tun my BFG's at 48psi on the black top. A little harsh on the ride but much better control around corners, less heat, less rolling resistance (read better fuel economy) and less deformation under breaking therefore more control? (the last point is debatable). I got 110K from my last set (80 series) but have MT's on my D1 so will need to see how I go with these.

I run Pirelli Scorpion A/T's 245 X 75,

40psi front and rear on the bitumen empty, 42 front 44 rear loaded.
26psi frt & rr on tracks
16psi on the beach.

these tyres have already done 99k and are still doing strong, I reckon there is still another 20k in them yet.