Under-inflation is the biggest killer of tyres, increasing irregular tread wear
BLOWING HOT AIR
TO FIND out what the correct pressure is for your rig, you need to do a tyre pressure increase test.
For this, you’ll need an accurate tyre gauge, preferably analogue (digital types work really well until the battery runs flat just when you don’t have a spare). Spend some good money on a quality gauge and take care of it – if it gets knocked around in the ute tray, it probably won’t be very accurate.
Check the tyre pressures with cold tyres, preferably after the vehicle has been standing overnight (or at least a couple of hours). Make sure the tyres are up to placard tyre pressures. Then, after driving around 50km at around 100km/h, stop and check pressures again. You should see a rise of 4psi from cold pressures for Passenger construction tyres and 5-6psi for Light Truck tyres. If the pressure rise is less, you have overinflated the tyres; if the pressure increase is more, you have under-inflated the tyres. In either case, it’s a matter of small pressure adjustments until you’re satisfied you’ve got the right pressures.
Under-inflation is the biggest killer of tyres, increasing irregular tread wear and the likelihood of damaging the carcass. Under-inflation typically happens because no one checks pressures, so they lose air. Make it part of your routine to check pressures at least once a day; better still, get a tyre pressure monitoring system so you can keep an eye on pressures as you drive.
Over-inflation doesn’t help tyre life, either, as it increases the risk of punctures, irregular tyre wear and decreased ride quality. Maximum tyre pressure is marked on the tyre sidewall – if you’ve exceed this, you’re asking for trouble.
Sensatyre monitoring screen is easy to use; time for new rubber!