Everyone knows and understands that tyres need air in them.
What people don’t always understand is that for tyres to operate correctly and also give the best wear-life, they need to be inflated to the correct air-pressure.
Obviously, the tyres on a vehicle carry the weight of the vehicle and keep the rims off the road but did you know that it’s not the tyre carcass that carries the vehicle load but the air-pressure in the tyre.
So, if you don’t inflate your tyres to the correct pressure, they won’t be able to carry the load of the vehicle as comfortably. The obvious effect of not putting sufficient air-pressure in your tyres is that will they will show excessive deflection of the Sidewall. At best, this will distort the tyre contact patch and cause Irregular Tyre Wear. At worst, the increased deflection will cause higher tyre temperature build-up of the tyre, leading to component fatigue in the carcass and potentially tyre failure.
The next query always is, “how much air should I put in my tyres?”
The answer to this question is always the same – tyres should always be inflated to the pressures specified by the Vehicle Tyre Placard. Also, if the vehicle is being driven heavily loaded or at sustained high speeds, then the cold inflation pressure must be increased to compensate for the more severe service.
The tyre pressures for both “normal” and high-speed/high-load are specified on the Vehicle Tyre Placard.