![]() Speed ratings do not apply to tires that have been damaged, altered, under-inflated, overloaded or repaired. ![]() Your tires’ actual speed capability may be less than its rated speed, since it is affected by factors such as inflation, wear, vehicle condition (including alignment), driving conditions and the duration at which speed is maintained. ![]() fully inflated, vehicle running properly, good weather conditions). Think of your tire’s speed rating as an indicator of the product’s capability under controlled conditions (i.e. However, it’s important to remember that the lab can’t simulate every conceivable condition. Industry standards govern the process of reaching and maintaining a given speed during a test. To receive any kind of rating, a tire must demonstrate that it’s capable of sustaining a particular speed. Speed ratings are the product of laboratory testing – with simulated speeds and loads. The rating will nearly always exceed maximum highway speed limits, but no tire or vehicle manufacturer advises driving faster than the law allows. Does the speed rating on each tire match what the manufacturer recommends? It should!Īlso remember that the tire speed rating isn’t the same thing as a recommended travel speed. To view the tire size code for your current tires, just look at the sidewall. For example in this tire code: “P205/60R16 82S,” S is the speed rating. Speed rating is easy to locate because it’s usually the last item in the character sequence in the tire’s size code. You might also find it in the driver’s side door jamb, the gas tank hatch, or inside the glove box door – anywhere that lists the right tire code for your vehicle. If you’re wondering what tire speed rating your vehicle manufacturer recommends, simply look in the manual. Tire speed ratings do not imply that the vehicle may safely be driven at the maximum speed for which the tire is capable, particularly under adverse weather or road conditions.įind Your Tire HOW TO FIND YOUR TIRE SPEED RATING In other words, it’s the fastest speed a tire can handle before it does not perform as designed. Most modern passenger tires bear a tire speed rating, a designation indicating the tire’s designed speed capability.
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