What'southward On Your Tire's Sidewall?

With a piddling explanation it'southward easy to empathize what all of the messages and numbers mean on your tire's sidewall. The numbers are indicators of the size, type, and performance of the tire.

Enter your information to run across the tires that fit your vehicle.

tire type at the beginning of the tire size

Tire Blazon

The alphabetic character "P" at the commencement of the "Tire Size" tells us the tire is a P-Metric tire, referring to tires fabricated to certain standards within the United States, intended for Passenger vehicles.

If a tire size has no letters at the starting time, 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 cease of the tire size bespeak the tire was designed for light trucks. Vehicle manufacturers equip some light trucks with "LT" type tires. These tires by and large crave higher aggrandizement pressures than passenger tires.

Consult your owner'southward manual or tire placard for the recommended tire size and aggrandizement force per unit area for your vehicle.

Tire width displayed as the first three-digit number on a tire

Tire Width

Is the width of the tire measured in millimeters from sidewall to sidewall. The offset 3-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 displayed as the two-digit number after the slash mark on a tire

Aspect Ratio

Is the ratio of the summit of the tire's cross-section to its width. The two-digit number after the slash marker in a tire size is the aspect ratio. For example, in a size P215/65 R15 tire, the 65 ways that the pinnacle is equal to 65% of the tire'southward width. The bigger the aspect ratio, the bigger the tire's sidewall will exist.

A tire's radial construction is displayed within the tire size

Construction

The letter "R" in a tire size stands for Radial, which means the layers run radially across the tire.

The wheel diameter is displayed within the tire size

Wheel Diameter

Is the size of the wheel measured from i end to the other. Information technology 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" bore.

Load Index

Indicates the maximum load that the tire can support when properly inflated. You lot'll also find the maximum load on the tire sidewall, in both pounds and kilograms. Learn more than well-nigh tire load index.

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. Learn more about tire speed rating.

DOT Symbol

The letters "DOT" on the sidewall indicate that the tire complies with all applicable Federal Motor Vehicle Prophylactic Standards in the U.s..

Tire Identification Number

The series of letters and numbers following the letters "DOT." The TIN consists of upwards to 12 numbers and messages to place the manufacturing plant 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. Section of Transportation to provide consumers with information to aid them purchase tires based on their relative treadwear, traction and temperature capabilities.

Traction grades indicate the moisture traction of a tire under a controlled test. A tire with an "AA" rating offers outstanding traction in moisture conditions.

Traction Grades
AA
A
B
C

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
A Over 115
B Between 100 and 115
C Between 85 and 100

Treadwear grades are based on standardized regime tests to assistance predict the expected treadwear of a tire. For case, a tire with a treadwear grade of 200 should last twice as long as a tire with a treadwear grade of 100.

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