Q: Is there a model number, etc. on my car tire that can help me find its speed rating and load index (service description)?

asked by on

Is there a model number, etc. on my car tire that can help me find its speed rating and load index (service description)?

Your tires are an essential part of your vehicle. They can affect it in so many different ways. Not only are they a component that we can expect to spend money on over time, but they also have a huge impact on the way that the vehicle handles, how comfortable it rides, and your tires can also give you an idea of other things going wrong with your vehicle. To ensure that your tires give you the proper amount of life and that they also perform as you would expect it is important to choose the right tire for your vehicle. Knowing the service descriptions on your tires can help you to make a knowledgeable choice.

Besides the tire size there are five main service descriptions on your tire. The first being treadwear. The treadwear rating is a rating given to the tire based on how long the tire should last. There is no standard mileage based on this rating, but the higher the number the longer the tire will last. The next is the load rating of the tire. The load rating is a maximum weight rating that the tire can handle when the tire is in good shape. This weight should never be exceeded as the tire can fail while it is being used. The speed rating is a very important part of your tire’s service description, especially on performance vehicles. The speed rating comes in later form t letter correlates to a maximum speed. If the vehicle is driven at a high rate of speed you will want to make sure that your tire has the correct speed rating for your vehicle. You should also pay close attention to the temperature rating and the traction rating of the tire. Both of these can have an impact on the way that the vehicle handles and how long the tires last. These ratings are based on how well the tire will handle or grip in wet weather and what kind of temperature that the tire can maintain whether it be from hot weather driving or from aggressive driving. These ratings both show in letter form. When it comes to the temperature rating it comes in an A, B or C rating, with A being the highest and C being the lowest. The traction rating is similar, except it has an AA rating as the highest rating and a C as the lowest. These ratings typically will coincide with the quality of the tire, how long it will last, and how much is costs.

It is important that you are using the correct tire for your vehicle. When it is time to purchase new tires you should always choose tires with the same ratings as the tires coming off of the vehicle of not higher. In some cases you may need to purchase tires with lower ratings due to cost, but it is essential that you get as close as possible as that will ensure the safety and performance of the vehicle and can keep the tires from wearing out too quickly. If you have a hard time choosing the right tire you should consult a knowledgeable tire professional or technician.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Is there a model number, etc. on my car tire that can help me find its speed rating and load index (service description)?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Why do my front tires lean in slightly?

If the front tires are leaning in at the top, this will cause the tires to wear on the inside. This is caused by worn ball joints and control arm bushings. It could be upper or lower control arms bushings...

Q: How can I determine my tire's size?

Most of us never think about what size our tires are; it's something that usually remains out of mind until getting ready to purchase tires, or thinking about changing tire size. The size of your tires can be easy to...

Q: Are Euro-Metric and P-Metric Tires Interchangeable?

When looking for tires, you may run into some confusion when you see words like euro-metric or p-metric. With all of the other ratings on tires, such as temperature, load, treadwear, and traction, adding these other terms into the mix...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...