What does R and W mean on tyres?
V, Z, W, Y and (Y) are for sports cars. L rated tyres are primarily for off-road and light trucks. Q is primarily for winter 4x4s. R is primarily for heavy-duty light trucks. S and T are primarily for family saloons and vans. Confusingly, W-rated tyres are rated at a higher speed in excess of 168mph. Y-rated tyres are rated in excess of 186mph. See the full list below. Tyre speed ratings should be matched to the official top speed of your car.For example, a “245/35R20 95W” has a speed rating of W. The numbers before the W indicate the tire’s load rating. In this example, this specific tire has a speed rating of W, which is rated for 168 mph, or 270 kph.This means that a tire with a V-rating, for example, can be driven at 149 miles per hour until it wears out! Less frequently seen ratings are Q 99 mph and R 106 mph- used in some light truck tires. The W rating replaced what was once Z, which was anything above 149 at the time, and is now limited to 168 mph.
What is the difference between 91w and 95w tires?
The primary distinction between 91w and 95w tyres lies in their load-bearing capacity. A 91w tyre has a maximum load capacity of 615 kilograms per tyre, whereas a 95w tyre can bear up to 690 kilograms per tyre. The ‘w’ denotes the tyre’s maximum speed capability of 270 km/h while supporting the vehicle. Typically, tyres with a W rating can handle a maximum speed of 168 mph. However, it is important to keep in mind that your tyre rating does not necessarily indicate the top speed that your vehicle is cable of reaching. Vehicle manufacturers specify higher ratings to stay safely within the capabilities of the tyres.
What is the 3% tire rule?
The 3% tire rule is a guideline for upsizing tires. It recommends keeping the new tire’s diameter within 3% of the original to avoid affecting performance and safety. Likewise, it is advised you stick within the 1. Incorrect tyre sizing can cause damage to the car. Bigger rims, or wider tyres, will make contact with the wheel arch, causing excess wear and tear, as well as more difficult driving.Vehicles can, in fact, benefit from an increase in tire width. Using a wider size while maintaining the same overall diameter is known as “plus-zero” sizing.