The Tyre and Rim Association of Australia
Official site of Australian Tyre and Rim Standards Manual
Definition of Terms
New Tyre Dimensions
Measuring Procedure for New Tyres
Design/Measuring Rim Width – “Design/Measuring Rim Width” is the specific rim width assigned to each tyre size designation to determine basic tyre dimensions.
Tyre Section Width – The linear distance between the
Load Identification
Identifying Loads on Tyres
Standard Load and Extra Load are used to identify a given size tyre with its load and inflation limits when used in the specific service as defined in the heading of the Tyre and Rim tables.
Tyre Flatspotting
Do you ever notice a vibration or a steering shimmy during the first few kilometres of driving after your car has been parked overnight or longer ?
The vibration (or shimmy) is apparent for a while, then goes away. This
All my tyres will wear at the same rate, won’t they?
The Benefits of Wheel Rotation
The load on each of the tyres on your car is different depending on the tyre’s position. What this means is that, depending on the mounting position of the tyre, the wear-rate of that tyre
Why do I have Irregular Wear on my Car Tyres?
One of the most common queries on tyres that we receive is:
“Why have the tyres on my car worn so poorly? There’s plenty of tread on one side and the other side is bald!!” (or a variation on that
Why should I give my car a Wheel Alignment?
General Tyre Safety Standard
When you’re driving along in your car, all of the wheels are heading in the same direction as the car, aren’t they?
Well, no they are not!
The alignment of the wheels on the average car
Why has my tyre suddenly disintegrated?
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