The speed rating is a letter code assigned by the tire manufacturer to indicate the maximum speed capability of the tire. It is important to choose a tire with a speed rating that is suitable for your vehicle and driving habits.
The speed rating is determined by laboratory tests that simulate the tire's performance at various speeds. The rating is then assigned based on the highest speed at which the tire can safely perform without risk of failure. The ratings range from Q (99 mph) to Y (186 mph), with some tires rated above Y for ultra-high performance vehicles.
It is important to select a tire with a speed rating that is equal to or greater than the maximum speed of your vehicle. If you choose a tire with a lower speed rating than the maximum speed of your vehicle, you may experience handling and safety issues at high speeds. This can increase the risk of an accident, particularly if you drive on highways or freeways with high speed limits.
Additionally, using tires with a lower speed rating than recommended by the vehicle manufacturer can affect your car's warranty. If your car is involved in an accident and the insurance company discovers that you have used tires with a lower speed rating, they may refuse to pay for damages or repairs.
In summary, the speed rating of a tire does matter and should be taken into consideration when selecting tires for your vehicle. Always choose a tire with a speed rating that is equal to or greater than the maximum speed of your vehicle and recommended by the vehicle manufacturer.
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