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Speed ratings are a measure of the truck tire’s ability to rotate quickly in order to provide the vehicle with maximum traction and help it maintain that maximum speed for the entire duration of a long distance. Generally speaking, the higher the speed rating, the faster the tire will rotate. This is true whether or not the truck is traveling downhill or uphill. When comparing products from different manufacturers, such as between models, it is important to compare what is the speed rating on tires to find out which brands provide the most efficient performance.
A tire with a high speed rating may have low pressure, but this isn’t always the case. It depends on the individual make and model of the tires. It also depends on the manufacturer of the vehicle, since some brands are better at handling different types of road surfaces than others. For example, tires designed for gravel roads are usually lighter and have lower temperatures than those used on highways.
The other question to answer when considering what is the speed rating on tires is how well manufacturers have tested them. The test results should list all the components that were tested, along with the speed and weight of each vehicle during testing. Furthermore, the manufacturers should provide written guarantees that they stand behind their product, in case of damage or defect.