Tire Codes Explained

Explanation of tire codes 3-digit number: The "nominal section width" of the

tire in millimeters; the widest point from both outer edges (side... /: Slash character for character separation. 2- or 3-digit number: The "aspect ratio" of the sidewall height as a percentage of the nominal section width ...

Tire service type ratings Most tire sizes begin with one or more letters --

for example, P or LT. The letter tells us what type of vehicle or service the tire was designed for. P = P-Metric (Example: P 215/65R17 98T)

The DOT code is used by the Department of Transportation (DOT) to track tire

production for recall purposes. If a tire proves to be defective, this number helps keep track of where these tires...

The uniform tire code is imprinted on nearly every vehicle tire manufactured

. This code not only identifies the tire, it also provides useful information about the tire. The first post focused on the type of tire and section width and the second post looked at aspect ratio, tire construction and wheel diameter.

Load index is a code that indicates how many pounds a tire can carry at a gi

ven inflation level. In this instance, a load index of 92 would mean that tire is capable of carrying 1,389 pounds at 36 psi inflation. H — this indicates the speed rating. Speed rating is the highest speed a tire can safely handle, determined through lab testing.

To find your tires’ age, you need to locate the DOT Date Code on the tire.

This symbol indicates the tire manufacturer’s compliance with the U.S. Department of Transportation (DOT) National Highway Traffic Safety Administration (NHTSA) safety standards. It tells you who manufactured the tire, where it was made, and other tracking information.

On the sidewall opposite the one with the full DOT code, only the letters DO

T and the first four digits of the code are required. 5. Tire Ply Composition and Materials. Information on the materials used in the tire’s internal construction is listed next to the DOT code. This information includes both the ply composition—that is, the number ...

“Stamped” on the outer sidewall of each tire is its birth date in a stra

ightforward week/year format. Scan the tire sidewall in a clockwise pattern and find the letters “DOT” (which signifies the tire’s compliance with U.S. Department of Transportation’s laws & regulations).

A tire's speed rating is an indication, expressed as a letter code on the ti

re sidewall, of a speed the manufacturer expects the tire to be able to sustain over a long period of time without coming apart.

Tires built before 2000 featured a three-digit date code at the end of the T

ire Identification Number. The first two digits of the date code tell you the week that the tires were built, and the last digit tells you the year. For example, a date code such as 306 would let you know that the tire was built in the 30th week of a year ending in 6.

Tire Code Explained: All You Need to Know. Everything you need to know about

a tire that's been manufactured for use in the United States and in most European countries can be found in the tire code. There are actually two codes that can be found on tires manufactured for use in the United States: ...

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.

P =Passenger Car Tire The first letter on a tire indicates the tire’s clas

s. P designates this tire as a passenger car tire, an LT before the tire size would mean the tire is a light truck tire, and a European metric tire would have no letter before the tire size. 245 =Section WidthTread (mm)

What is tire load index. Tire Load Index is a number that corresponds to the

load a tire can carry at its maximum internal air pressure. Improper matching of the load index to the weight of a loaded vehicle (if the vehicle weight exceeds the value of the tire speed index) may result in rapid loss of tire performance and may even result in the tire exploding.

P195/60R15 87 S - The load index (87) is the tire size's assigned numerical

value used to compare relative load carrying capabilities. In the case of our example, the 87 identifies the tire's ability to carry approximately 1,201 pounds. The higher the tire's load index number, the greater its load carrying capacity. 89 = 1,279 pounds

For example, a code of 60 means a tire can carry up to 550 pounds. The highe

st code is 125, which can carry approximately 3,600 pounds per tire. Speed Rating. This tells you how fast you can drive on your tires. Code A1 means that you can go 3 mph at the specified load index. This goes up to code Y, which allows you to travel up to 186 mph.

This code is an alphanumeric code that can be seen on the sidewall of every

tire. The DOT requires tire manufacturers to stamp the code on each and every tire. The reason for the DOT Code is, first and foremost, vehicle safety. For example, the code helps with safety by making it possible to track sales.

Some tires get a "Z" or an "F" attached to the radial indicator, denoting a

Z-rated tire (see service description below) or a run-flat tire. 5) This alphanumeric code is the service description ...

The tire name may be letters only or a combination of numbers and letters, s

uch as Goodyear's Eagle F1 GS-D3, the Hankook Ventus R-S2 Z212, or the Kumho Ecsta MX. 2 Look at the service description. The service description, although it doesn't appear on every tire, is usually right after the manufacturer name.

2 Ratio between tire section height and nominal section width. This ratio is

not indicated when section width is expressed in inches (eg. 3.50-18). 3 Code for tire construction (- = Bias, R = Radial, B = Bias Belted). 4 Nominal rim diameter size in inches. 5 "Motorcycle" in abbreviated form. Differentiates motorcycle tires and rims from those ...

The last four digits of this code tell you when your tire was manufactured.

The first two numbers indicate what week of the year it was made (out of 52 weeks per year), and the second two numbers represent the year. For example, 5200 would reveal that a tire was manufactured during the 52nd week of the year 2000.

A tire's size is indicated within the markings on the sidewall of every tire

. The mix of letters and numbers make up codes that, in addition to the tire size, can be used to determine a wealth of information about your tire. These alphanumeric markings can instantly tell you about the tire type, construction, and other features.

Use a flashlight to find the Department of Transportation code on the tire.

The DOT code starts with the letters "DOT" and is followed by 10, 11 or 12 letters or numbers. Step 2 Record the last four numbers of the DOT code.

Tire Size Explanation. You are one step away from getting a detailed, color-

coded explanation of a specific tire code. Just click on a size below to get a break down of what it means. You will also get a list of vehicles that are compatible with the size you choose. Our tire code explanations are easy to understand.

The U.S. Department of Transportation tire code is a serial number recorded

in case of a recall. This figure is found along sidewall edge near the rim starting with "DOT." A tire DOT code lists the manufacturer's code and a tire manufacture date. The tire date code marks a tire's production year and is placed at the end of the DOT code.The date ...

A: TIRE TYPE The first letter in the code tells you what class of tire it is

. P stands for passenger vehicle tire. P-class tires include cars, SUVs, crossovers, minivans and smaller pickup trucks. LT means light truck tire, designed for vehicles that are towing trailers or have ¾- and 1-ton load capacity. ST stands for Special Trailer. These ...

LT or Light Truck are tires for towing trailers or have a 3/4 to 1 ton load

capacity. T. A tire labeled “T” or Temporary Spare is meant to be used in the event of a flat tire. ST. Tires labeled “ST” or Special Trailer are meant for trailers. Including but not limited to boat trailers, utility trailers, and 5th wheels.

DOT NUMBER: The D.O.T. number is a code that one can find on the sidewall of

all over-the-highway tires signifying the fact that the tire complies with the U.S. Department of Transportation motor vehicle safety standards. The code identifies the manufacturer, manufacturing plant, tire size, tire type and the week and year of manufacture.

Truck Tire Sizes Explained. The tire size typically starts with a letter ind

icating the type and ends with a two-digit number, giving the rim size. Between these parts, you will see additional information about the tire size and construction. 1. Tire Type. The first letter represents the type of vehicle you should install the tire on.

If a tire is designed for extra traction in mud and snow, you'll also see th

e designation "M+S." You should buy the best tire your budget allows and one that fits your driving needs, too. Interestingly enough, if you wanted to buy the worst-graded tire for traction (a tire with a "C" rating) you wouldn't have much to choose from.

DEPARTMENT OF TRANSPORTATION SAFETY CODE. The Department of Transportation (

DOT) insignia is your tire's identification number. Think of it as a birth certificate for your tire. It shows the plant where your tire was manufactured, the week and year it was produced and more.

Read the last four digits of the DOT code on most tires. The DOT code should

end in a four digit number. The first two digits identify the week while the last two digits identify the year. This applies to all tires made after the year 2000. For example, if your DOT code is “DOT X5DR GG1U2214” that would mean that your tire was created in ...

Tire Designation. An code molded into the sidewall of the tire that describe

s the tire’s size, including width, aspect ratio, rim diameter, load index, and speed rating. Most designations use the P-Metric system. Tire Mixing. A situation in which tires of various brands, types, or sizes are mixed on a vehicle.

Tire code or Tyre code - Automobile tires are described by an alphanumeric c

ode, which is generally molded into the sidewall of the tire. This code specifies the dimensions of the tire, and some of its key limitations, such as load-bearing ability, and maximum speed.

The use of a partial Tire Identification Number on the one sidewall (shown a

bove) reduces the risk of injury to the mold technician that would have to install the weekly date code on the top sidewall portion of a hot tire mold.

A chart denoting tire speed rating codes is an essential reference when buyi

ng new wheels for your automobile. Identifying the Speed Rating Code The speed rating is denoted by an alphabet placed to the immediate right of the load rating , towards the end of a tire’s sidewall code.

To most people, the numbers and letters on the side of their tires are crypt

ic and indecipherable. This guide will help you understand the codes on the side of your motorcycle tires to be sure you know which tires you are currently using, and which others will fit your motorcycle. The tire size will also indicate what size rim strip and motorcycle inner tube is needed. Rim strips are rubber ...

Tire code explained: check the size of your tires The meaning of tire code e

xplained. Physical characteristics and dimensions in a tire. The basic characteristics of a tire, usually written with hot-stamped code markings on the side of the tire, are:

Codes. The first number is the width of the tyre in millimetres. In this cas

e it’s 180mm at its widest part, not the contact area. Front tyres are usually narrower than the rear and a wider tyre doesn’t necessarily mean it puts more rubber on the road which is more a result of the curvature of the tyre.

Mar king of the tire. Every tire has its own identity card on the sidewalls

that is useful if you know how to decrypt it. These markings provide information on the technical characteristics of tires and their performance. An unknown object: the tire. Materials; Manufacture of the tire ...

For instance, the tire seen above has a code of DOT DA08 JM1R 3011, which wo

uld indicate a tire manufactured in the 30th week of 2011. DOT R5HG FHR 404 would indicate a tire manufactured in the ...

Interesting Facts About Date Code on Motorcycle Tires Tire Codes Before 2000

source: quayle-co.com. Before 2000, the date code was written in three digits, and was considered logical, as no tire would serve for longer than a decade. The first pair meant the number of the week, the third number meant the year of the decade.

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For tires having a maximum speed capacity above 300 km/h (186 mph), a ZR mus

t appear in the size designation and a service description, including the Y speed symbol, must be included in brackets. Load Index. Tire load index is an assigned number that corresponds to the maximum weight that a tire can support when properly inflated. The higher ...

Tyre Markings Explained. Each tyre on your vehicle carries an imprint of var

ious codes and numbers. While this can be confusing to understand, tyre markings are important and carry a specific purpose. These markings are crucial when it comes to replacing the tyre, so it’s worth taking the time to become familiar with what these tyre codes ...

The last three or four numbers are the date code. Determine the week of manu

facture. The two numbers at the beginning of the date code are the week of the year the tire was made. This number will range from 01 to 52. For example, the manufacture code of 237 means the tire was made in the 23rd week of the year, because the "23" represents the week.

Trailer Tire Speed Ratings / Load Capacity (65mph): Unlike automotive tires,

all ST tires are tested and rated at by the DOT at 65MPH. This 65MPH test allows the tire to qualify as a high speed tire. Every ST Trailer Tire you see on the highway goes through this exact same test regardless of tire size or manufacturer.

How to read tire sidewalls and learn how safe your tires are!Why Cheap Tires

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