Thread: tyre pressure

I'm running 8 ply x-plys on the SIII with parabolic springs and good shocks. Even so, I ran similar pressures prior to having the suspension upgrade. The tyres before the suspension upgrade (10plys) lasted 100,000km, the centres wore out sooner because I had them up to 75psi a lot of the time. Note that I run truck steer tyres for on road use on this vehicle, so the same tyres on a truck would be at even higher pressures.

There are no traction problems in the wet.

On the RR I'm running 215/85R16 Sumitomos. The previous tyres were Kumhos (same size) and they lasted around 120,000 km before the belt went on a side wall and buckled the tyre. I figured they had about 6 months of tread left on them, but decided to replace them as a set.

I never (anymore) run retreads. I agree that differant tyres will handle the pressures differently, but I've consistently had better wear and performance by running higher pressures.

Originally posted by landrovermick
Interesting - i run the poly bags at 0 pressure off road, the last thing i wanted was stiff suspension, though higher pressures will give more lift and more ground clearance, whats is everyone else doing.

Kev i know you have spoken of bags before?

Mick

I use the polyairs to maintain ride height only.

If I am loading and or towing I inflate the bags to 30 psi then load the Disco and then reduce the pressures until the vehicle is level.

So if I am off road with load it is the pressure required to maintain that height and keep the departure angle reasonable.

Usually the minimum pressure I run with is 5 to 7 psi. Any less and there is a risk of pinching and puncturing the bag as the coil compresses.

I suspect it compromises the articulation but hell isn't everything a compromise.

Now as for tyre pressures I have used the 4psi rule for freeway stuff.

Off road on corrugated low speed stuff 23 psi all round with a tad more in the rear if loaded suits my BFG's.

Again it depends and I confess that I enjoy experimenting with tyre pressures but you can't change them on the run so again it is a compromise.