When buying new cars, you also get a new set of tires. But when replacing tires after some years, you need to know the tire information on the sidewall. Especially when finding the appropriate replacement, the tire size and the year of production need to be confirmed. The following is the explanation of the information on a tire sidewall. Tire rubber hardens or deforms with age, its internal structure changes, and causes degradation of its stability and the quality. Before you purchase tires, you must check the year of production. DOT code comes in handy in this case.
Tire Date Code and How to Read It
The condition of the tires on a car are what determines a car’s capabilities in terms of acceleration, braking and cornering. The rubber on a car tire degrades over time, and tire warranties can be tied to manufacturing dates. Every tire sold in the United States has a date code stamped on it. The date code will let you know when tires need to be replaced.
Learn how to read a tire sidewall with tips from BFGoodrich. Understand your tire’s type, width, speed rating and more, plus discover your Department of.
All new tires sold in the United States must have a DOT number cured into the lower sidewall of one side of the tire. This code has a standard format which has been designated by the federal government. Some manufacturers place an additional code with a specific serial, which identifies the specific tire model a tire type code. This optional number is located on the sidewall opposite the DOT number.
Commercial treads also include codes, which are used to detail retread information. This code is generally found on the lower sidewall near the original DOT code. There are many factors that contribute to how your vehicle performs, but few have as direct an impact as its tires. This short code, which consists of a two- or three-digit number along with a single letter, designates just how much weight your tires are capable of carrying safely load index and the maximum speed the tires are designed for speed category.
To verify if a specific tyre is affected by this program, check the tyre sidewall inscription. Only tyres DOT serial number / production date: DOT 6G21 FUKB
You can find tyre markings on the sidewall of your tyre. These sidewall markings help you understand everything you need to know about your tyre including its size, load capacity and speed rating. The information on your tyre is particularly important when it comes to replacing them, allowing you to easily find the right ones for your car. But how do you read the sidewall markings? This measures the width of your tyre from sidewall to sidewall. The measurement is in millimetres mm.
For example, a tyre with a load index of 91 can carry kg of weight. A typical passenger car will have a load index of 75 — , with each value corresponding to a weight in kilograms. Load ratings and speed ratings appear next to each other as they should be looked at together when you buy a new tyre.
How old are my tires?
Tires have very useful information molded onto their sidewall. It shows the brand and model name of the tire, its size, whether it is tubeless or tube type, the maximum load and the maximum inflation, safety warning s , and much more. The load range identifies the tire’s load and inflation limits. Load Index – The load index is a numerical code associated with the maximum load a tire can carry at the speed indicated by its speed symbol under specified service conditions.
The load index should not be used independently to determine replacement tire acceptability for load capacity. Max Load kg lbs and kPa 35 psi Max Pressure Cold — Passenger Example indicates maximum load and maximum cold inflation pressure of the tire.
on tire sidewalls. Use this guide to learn how to read a tire sidewall like a pro. Reading a Sidewall. Tires have very useful information molded onto their sidewall. Stay up-to-date with our specials and offers. Submit Please enter an email.
For years, people have relied on tread depth to determine when to replace a tire. If the tread passes the ” penny test , ” they assume the tire still has life, regardless of how old it is, which can be a fatal mistake. Old tires are dangerous, regardless of tread depth. While there’s no federally sanctioned safety guidance on when a tire is too old to be safe, many carmakers recommend replacement at six years from the date of manufacture. When he was driving two weeks later, the tread suddenly separated from the tire.
The Explorer went out of control and hit a motorcycle, killing its rider. An analysis of the used tire revealed that it was nearly 10 years old. In a more recent and high-profile example, the investigation into the cause of the accident that killed the actor Paul Walker revealed that the Porsche Carrera GT in which he was riding had 9-year-old tires. The California Highway Patrol noted that the tires’ age might have compromised their drivability and handling characteristics, according to the Los Angeles Times.
The older a tire gets, the higher the risk of sudden and unexpected tread separation. Buying used tires is a risky move. You rarely know how the tire was maintained. The last four digits of the DOT code show how old the tire is. It’s easy to forget that your spare tire is aging.
Providing total tyre supply and service for commercial fleet operators of passenger, light truck, truck and bus fleets. When you’re weighing up the options of purchasing a franchise, one very important consideration is the power of the brand you’re buying into. Helps you to get the most from your investment. Our expert maintenance and care will maximise the life of your next tyres.
Our mission, values and commitment to sustainability and innovation define who we are and drive us to be the global leader in technology. Old tyres can be a ticking time-bomb that could dangerously fail and lose air.
The answer lies in reading the code stamped on the sidewall of each tire. The U.S. Department of Transportation (DOT) and Transport Canada.
All the important information you need to know about your tire is printed on the sidewall. Being able to read this information will help you maintain your tires, and choose new ones when the time comes. Our guide will help you understand all the different numbers and letters and tell you what they mean. Tire Pressure Information This is the maximum inflation pressure for your tire, which is important to know when checking tire pressure. You should check these indicators regularly to ensure the tread is sufficiently deep.
The minimum tread depth is in most cases 1. Production Date The date your tire was produced is indicated by a four-digit code showing the week and the year. Wheel Diameter The diameter height of the wheels in inches. Speed Rating The speed rating indicates the maximum legal speed for a tire when it is correctly inflated and in use under load. When buying replacement tires, it is essential to match their speed rating with the speed capabilities of your vehicle.
From maintaining proper inflation to being aware of your surroundings, take a look at the different ways you can help your tires last longer. Twitter Facebook Email Weibo print page.
Every sidewall has its own unique information that is divided into four main sections:. This describes the fundamental characteristics of your tire. Size, construction, speed rating and more. This designates the type of vehicle the tire fits. P is for passenger metric. Why millimeters?
Production date. This four-digit code tells you the week and year that your tyre was manufactured.
The sidewall of your tires is filled with important information that tells you everything about your tire regarding the dimensions, construction, operating characteristics and manufacturer. The easiest way to understand tire markings is to take an example and break it down. The absence of a letter at the beginning of the size description indicates that the tire is Euro-Metric. The main difference is that Euro-Metric tires may have different load carrying capacities than their P-Metric counterparts.
The represents the approximate section width or width of the tire from sidewall to sidewall. The larger the number, the wider the tire. The 60 refers to the aspect ratio which is the nominal sidewall height reflected as a percentage of section width. The final component of the size designation is called the Service Description, which indicates the Load Index and the Speed Symbol for the tire. Load Index, or 97 in this example, is a two or three digit code that represents the maximum load that can be carried at the speed indicated by the speed symbol.
In order to determine the actual maximum load for the tire, you must consult the Load Index Chart below. The Speed Symbol, or V in this example, indicates the maximum speed for the tire, but it is more like a performance rating that reflects the handling characteristics after it is installed on the vehicle. To find the maximum speed for your tire, refer to the Speed Rating Chart below. The first grouping of two to three letters or numbers represents the assigned identification mark for the manufacturer.
The second group can be no more than two symbols and identifies the tire size.
Want to know how old your tires are or what size your tires are? You need to know how to read tire sidewall information, the alphanumeric code stamped on to the side of your tires. But if you’ve ever looked at the sidewall of a tire and thought that the blizzard of numbers, letters, and words was as confusing as hieroglyphics, we understand. The alphabet soup on tires’ sidewalls can be off-putting, but it’s pretty easy once you know what you’re looking at.
Beyond the brand Michelin, Continental, Hankook, etc. Not to worry.
Their ‘date of birth’ is written on the tyre sidewall. Look out for a four-digit code. The first two figures represent the calendar week in which it was made (from 1 to 52).
The rule of thumb is to replace tires when they are 6 years old, even if they appear to be in good condition. This is because the rubber can develop dry rot and other structural damage that you may not be able to see.
Where can I find my tyres’ age?
What is the proper tire inflation? Maintain air pressure at the maximum PSI recommended on the tire sidewall. It’s best to check tire pressure with a quality tire gauge when tires are cold and in the shade. Under inflation is the number one cause of trailer tire failure.
On the sidewall of a tyre you will be able to find a 10 to 12 digit serial tyre identification number, which is usually preceded by the acronym “DOT”, for example.
To verify if your tire is affected by this program, check the tire sidewall inscription. The attached pictures provide samples of the relevant sidewall inscriptions. To see a list of tires affected by this recall, click here. Please see these instructions for an example of how to read a tire sidewall. There are four major components of the sidewall lettering which help to identify the tire:. Important: The complete DOT serial number including production date is visible only on one side of the tire.
Reading Your Tire
Each of your tires has useful information molded right into its sidewall. You’ll find the tire’s brand, size, construction details, maximum load and inflation pressure, as well as traction, treadwear and temperature grades. The trick is knowing where to look. The diagram below will help you make sense of your tire’s sidewall:. The tire sidewall shown above is an example of a popular “P-metric,” speed-rated tire.
Some older speed-rated tires may include the speed symbol immediately before the “R” instead of providing a service description.
The manufacture date is located on the sidewall of the tyre, displayed as a four-digit number; the first two are for the week and the last two for the year.
F-1 is free rolling single rib steer tire, best suited for wet mucky soils, typically complementing rear R F-2 is free rolling 3-Rib steer, general dry land farming tire, typically complementing rear R F-2M is free rolling 4-Rib steer, general dry land farming tire, typically complementing rear R I-1 is free rolling multi-rib tire, used on variety of towed implements. F-I is free rolling multi-rib tire same tread pattern as I-1 ; however, it is DOT approved for specified highway service speeds.
R-1 is bar tread drive tire used for general dry land farming. R-1W is bar tread drive tire same pattern as R-1 , best suited for wet sticky soils, with approx. R-3 is button tread drive or free rolling tire designed to minimize soil disturbance, approximately half the tread of standard R