With a little explanation it's easy to understand what all of the letters and numbers mean on your tire's sidewall. The numbers are indicators of the size, type, and performance of the tire.
Tire Type The letter "P" at the beginning of the "Tire Size" tells us the tire is a P-Metric tire, referring to tires made to certain standards within the United States, intended for Passenger vehicles.
If a tire size has no letters at the beginning, this indicates a Euro metric tire. P-Metric and Euro-Metric tires may have different load capacities.
The letters "LT," either at the beginning or at the end of the tire size indicate the tire was designed for light trucks. Vehicle manufacturers equip some light trucks with "LT" type tires. These tires generally require higher inflation pressures than passenger tires.
Consult your owner's manual or tire placard for the recommended tire size and inflation pressure for your vehicle.
Tire Width is the width of the tire measured in millimeters from sidewall to sidewall. The first three-digit number in the tire size refers to the tire width. For instance, in a size P215/65 R15 tire, the width is 215 millimeters.
Aspect Ratio is the ratio of the height of the tire's cross-section to its width. The two-digit number after the slash mark in a tire size is the aspect ratio. For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire's width. The bigger the aspect ratio, the bigger the tire's sidewall will be.
Construction. The letter "R" in a tire size stands for Radial, which means the layers run radially across the tire.
Wheel Diameter is the size of the wheel measured from one end to the other. It tells us the size of the wheel that the tire is intended to fit. A size P215/65 R15 tire is made for a wheel with a 15" diameter.
Load Index indicates the maximum load that the tire can support when properly inflated. You'll also find the maximum load on the tire sidewall, in both pounds and kilograms. Learn more.
Speed Rating tells you the maximum speed capability of a tire. Often speed ratings are matched to the top speed capability of the vehicle. For example, a tire with an H-speed rating has a maximum speed capability of 130 mph or 210 km/h. Goodyear does NOT recommend exceeding legally posted speed limits. View Speed Rating Chart
DOT Symbol: The letters "DOT" on the sidewall indicate that the tire complies with all applicable Federal Motor Vehicle Safety Standards in the United States.
Tire Identification Number: The series of letters and numbers following the letters "DOT." The TIN consists of up to 12 numbers and letters to identify the factory location and the week and year the tire was manufactured.
UTQG stands for Uniform Tire Quality Grading, a rating system developed by the U.S. Department of Transportation to provide consumers with information to help them purchase tires based on their relative treadwear, traction and temperature capabilities.
Traction grades indicate the wet traction of a tire under a controlled test. A tire with an "AA" rating offers outstanding traction in wet conditions.
Temperature grades indicate the ability of the tire to withstand and dissipate destructive heat. A tire with a higher temperature grade is able to operate at higher speeds.
|Temperature Grades||Speeds in mph|
|B||Between 100 and 115|
|C||Between 85 and 100|
Treadwear grades are based on standardized government tests to help predict the expected treadwear of a tire. For example, a tire with a treadwear grade of 200 should last twice as long as a tire with a treadwear grade of 100.
* Free tire check: No purchase necessary. Instant tire rebate. Subject to credit approval. To double the instant savings the qualifying Goodyear, Dunlop or Kelly tire purchase must be made on the Goodyear Credit Card. Offer valid at participating Goodyear Auto Service locations only. Most vehicles. No other discounts apply. Will be deducted from the price at time of purchase. Purchase of a set of Goodyear, Dunlop or Kelly tires includes one free pair of Valvoline Front Windshield Wiper Blades; excludes rear, winter, and specialty blades. Includes free wiper installation at the time of tire purchase. Tires must be installed at the time of purchase. Additional charge for shop supplies, up to 7% or $25 maximum, may be added. Special State Exceptions: FL - waste fluid fee may apply; CA - $2.50 fluid disposal fee applies but no additional charge for shop supplies applies; PA - no fluid disposal charges apply; NY - no fluid disposal or additional charge for shop supplies applies. See store associate for complete details.
§§ Free Flat Repair Includes: Dismounting and inspection of the tire to determine the cause of the inflation pressure loss and whether or not it can be repaired. Repairs performed in accordance with strict industry standards and Proper plugging/patching from the inside of the tire if suitable for repair. Most passenger and light truck tires and is applicable only to individual consumers and does not include a new TPMS sensor.
* There may be fees associated with your tire purchase and these may vary by location. Some states and local municipalities charge fees and taxes specifically on tires. Some vehicles require additional parts and/or labor to install tires. These fees are listed on the website and on your invoice when your tires are installed.
** Your local store manager will do their best to ensure that the tire you select is in stock before you arrive for your schedule appointment.
§ Oil Change suggested price is based on the vehicle manufacturer's recommendations based on type and amount of oil for your vehicle. Up to 5 quarts of oil. Must present coupon to get this offer. Cartridge or non standard filter and/or additional diesel oil extra. Fluid/filter disposal charges may apply. Additional charge for shop supplies, up to 7% or $25 maximum, may be added. See store for complete details. Special State Exceptions: FL - Waste oil / filter fee may apply; CA - $2.50 fluid / filter disposal fee apply but no additional charge for shop supplies apply; PA - no fluid disposal charges apply; NY - no fluid disposal or additional charge for shop supplies apply. No other discounts apply. Cash value 1/50¢.
DuPont™ and Kevlar® are trademarks or registered trademarks of E.I. du Pont de Nemours and Company