Various countries have tyre ratings to guide manufacturers in the production of quality tyres. In addition, the tire ratings help the consumer to select the right replacement for the worn out tyre or when buying a new tyre. Consumers should have the chance to compare the tyres’ treadwear, temperature resistance, and traction performance. Each tyre manufacturer is required to grade their tyres according to tyre rating guidelines, as will be discussed in this paper. Dunlop tyres will be discussed, too.
Although tyres are often taken for granted, they contribute significantly to the safety of the driver and the vehicle. The failure of the driver to use proper types of tyres, incorrect inflation pressure, and worn out tyres can lead to dangerous driving, thereby causing loss of life and property. When tyres and wheels are out of balance, tire wear and driver fatigue are increased, which may create a driving hazard.
A tyre’s resistance to heat is referred to as temperature rating. Tyres are graded according to how they can resist heat. For instance, high temperatures can cause a tyre puncture. In addition, driving in hot weather for long distances can lead to tread separation and blowouts in tyres. The highest to the lowest temperature rating includes grades “A”, “B” and “C”. Grade A tyres are said to have a higher temperature rating that grade B and C. All Dunlop tyres have a grade of temperature rating (Knowles, 2010, p. 62).
The ability of the tyre to stop on a wet surface is referred to as the traction performance. High traction rated tyres should enable drivers to stop their motor vehicles on wet roads faster. However, tyres with a lower traction performance cannot allow drivers to stop fast on wet surfaces. Traction performance grades include “AA”, “A”, “B”, and “C” (highest to lowest) (iSeeCars,