$average speed symbol$

Note: A tyre with ZR symbols have a speed capability of over 240km/h.

See the chart above for a full list of speed symbols and their applicable values. The Tyre & Rim Association of Australia – Standards Manual can assist with ensuring that your new tyres will last the distance by indicating the correct inflation pressures for higher load index tyres It is important to note that if you increase the Load Index on the tyres to those above the placard, you should ask what inflation pressure is required to carry the same load as the original tyres. Those who off-road or use their vehicle to transport goods will want to use a tyre with a higher load rating compared to those who use their car just for commuting. Most passenger vehicle load indexes range from 62 to 126. In this case, 98 would refer to a load capacity of 750kg. The load rating, represented by the numerical value, is directly related to the maximum weight that each tyre can carry. The second letter, Y, refers to the speed symbol of the tyre. The first number, 98, refers to the load index of the tyre. Your tyre’s speed symbol and load index markings are located on the sidewall, next to the tyre size markings.įor example, if your tyre’s sidewall markings were 235/45R18 98Y, the last section of the sidewall markings ‘98Y’ indicate the load index and speed symbol. If the maximum indicated speed or load is exceeded, your tyre’s will not operate at peak efficiency and risk the safety of yourself, your vehicle and those around you on the road.įinding Your Tyre’s Speed Symbol & Load Index Operating in high-performance scenarios, such as being used as a track car Transporting goods, such as a light truck or ute However, knowing your tyre’s speed and load limitations is crucial if your vehicle’s main purpose is any of the following:

Often, a standard passenger car with the right tyres won’t ever reach the maximum speed or weight capacity indicated by the tyres. For the average commuter, it’s not common knowledge what the speed symbol and load index on your tyres mean.

Average speed symbol