How to Read Tire Size

Have you looked at the letters and numbers on the sidewall of your tires and wondered what they meant? There’s more to the information on your tires than many Flower Mound drivers may realize. Learn more about how to read tire size numbers and information with Lone Star Toyota of Lewisville.

Tire tread detail

What Do the Numbers on Tires Mean?

When you look at the sidewall of your tire, you will notice there’s a sequence of numbers and letters. This information shows what kind of tire you are driving on. Here are the basics:

  • First Letter Set: The code sequence starts with the letter “P,” which means the tires are for a passenger vehicle. If you see “LT,” that means the tires are for a light truck.
  • First 3-Digit Number Sequence: This set of numbers informs you of the width of your tires in millimeters from sidewall to sidewall. It’s separated from the next set of numbers by a slash (/).
  • First 2-Digit Number Sequence: The first two-digit number sequence lets you know the aspect ratio of the tire’s cross-section to the width of tires.
  • R: The letter “R” following the two-digit sequence means the tire’s layers that run along the tire radially.
  • Second 2-Digit Number Sequence: This is the diameter of the wheels when measured from one end to the other. If someone asks about the tire size, this is what they want to know.
  • Other Numbers and Letters: In addition to the code sequence mentioned above, there can be other letters and numbers on the tire. This information lets you know how much of a load the tire can bear, the maximum speed at which the tires can go, the tire identification number, and the Department of Transportation (DOT) symbol.

Learn More About Your Tires at Lone Star Toyota of Lewisville

If you need to replace your tires or have additional questions about how to read tire size numbers, stop by the Toyota service center at Lone Star Toyota of Lewisville. We also offer a variety of other services from auto body repairs, to oil changes, and custom kits. Contact us today with any questions about tires, how long your car battery lasts, or to schedule a service appointment!

More From Lone Star Toyota of Lewisville

  • 2020 Toyota 4Runner Interior Features & Dimensions

      The 2020 Toyota 4Runner is a top-rated, practical SUV that enhances your DFW area drives. When you need a vehicle that adapts to whatever you need, from road trips to commutes to the office, and everything in between, the new Toyota 4Runner SUV has you covered. Take a closer look at the Toyota 4Runner…

  • 2020 Toyota Highlander Towing

      Lewisville drivers in the market for a new, highly-cable SUV will be impressed by the new Toyota Highlander towing capacity. With the Highlander towing and Toyota Highlander cargo space, you’ll be able to travel throughout Flower Mound with all you need, safely and powerfully. Continue reading to discover more about the Toyota Highlander payload, cargo…

  • 2020 Toyota Tacoma MPG Ratings

      If you plan to put a lot of miles on your next truck driving around the Flower Mound area, you’re likely concerned about gas mileage. Maybe that’s why so many of our customers at Lone Star Toyota of Lewisville are impressed with theToyota Tacoma gas mileage ratings. Of course, there are several different Tacoma configurations available, each with a…

Saved Vehicles


You don't have any saved vehicles!

Look for this link on your favorites:


Once you've saved some vehicles, you can view them here at any time.

Contact Us

(469) 671-5500

Call Now

1547 S. Stemmons Fwy • Lewisville, TX 75067

Get Directions

Today's Hours:

Sales: Closed

Service: Closed

Parts: Closed

Lone Star Toyota of Lewisville 33.0213337, -96.9874464.