You may also need to consider a wheel alignment service. The vehicle’s steering or suspension geometry may need to be checked. Note: Tyres showing wear on one side, or showing feathered edges to the tread pattern, are often indicative of mechanical maladjustment. If your tyres are worn to the tread wear indicators (TWI) – 1.6mm or below – they must be replaced. Tread wearĮnsure tyres have adequate tread depth. Puncture repairs must meet Australian standards. If you want to know how to measure tyre tread depth in Australia, you should pay close attention to the following: Objects embedded in the treadĪll punctured or damaged tyres must be removed from the wheel for internal and external examination to ensure there is no hidden secondary damage which may later cause tyre failure. This is because tread depth is an important aspect of tyre care, improving safety when braking hard or quickly accelerating out of a dangerous situation. With that being said, Tyrepower recommend you should consider changing tyres at around 3mm of tread, rather than waiting for the minimum allowable depth. Anything below is considered unroadworthy. Legally in Australia, tyres must have a minimum tread depth of 1.6mm. How to Measure Tyre Tread Depth (to Australian Standards) This includes not showing signs of chunking (where chunks of tread break away), or separation from the tyre carcass. Tyres must also meet several test standards, including resistance to bead unseating and tyre strength, as well tyre endurance and high-speed performance. Every tyre must meet the requirements of ADR 23 before it is fitted to a new or used car. This ADR specifies the labelling and construction standards of tyres fitted to Australian cars. If you’re intending to modify your car so it rides low, it’s recommended you ensure it still meets legal requirements. It also specifies the distance between the bottom of the guard and the centre of the wheel. The wheel and tyre must be effectively covered by a guard. These safety standards are specified in the Australian Design Rules (ADR), and they include the following: ADR 42 Motor vehicles in Australia are subject to many complex but necessary safety standards, and tyres are no exception. Keep reading to learn more about Australian tyre safety standards, including how to measure your tyre tread depth. ![]() This is why knowing how to measure your tyre tread is so important. There are a number of factors involved in ensuring a smooth ride when driving, but without the appropriate tyre tread depth, you may quickly find your car difficult to control – particularly in wet weather or other slippery road surfaces.
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