This quick guide will help you find the manufacture date of your tire and understand how Tires Easy handles tire age based on the DOT Code. Keeping a record of your tires and understanding their age will help you save money on repairs and take proper care of your vehicle. It tells you who manufactured the tire, where it was made, and other tracking information. The raised numbers of the DOT Code are placed together and often enclosed in a raised oval. The first two numbers are the week the tire was manufactured. In the image below, we see the 07, indicating the tire was build in This particular tire was made in the 35th week of
Reading a Tire Sidewall
Tires are just about the most important part of your car. If they’re in bad shape, the car’s ability to accelerate, stop, and turn in all conditions is greatly compromised. Everybody knows to replace tires when the tread gets down to the wear bar, but what about when they get too old? The rubber in tires deteriorates over time due to UV and environmental exposure.
Effect of Text Format on Determining Tires’ Date of Manufacture, The DOT number, an alpha-numeric code found on the tire sidewall, has.
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. Sidewall markings are given in both metric and English units. Max Load Single kg lbs at kPa 80 psi Max Pressure Cold Max Load Dual kg lbs at kPa 80 psi Max Pressure Cold — Light Truck Example indicates the maximum load of the tire and corresponding maximum cold inflation pressure for that load when used in a single or dual configuration.
Department of Transportation U. DOT tire safety performance standards.
Each new tire manufacturer must conspicuously label on one sidewall of each tire it manufactures, except non-pneumatic tires or non-pneumatic tire assemblies, by permanently molding into or onto the sidewall, in the manner and location specified in Figure 1, a TIN consisting of 13 symbols and containing the information set forth in paragraphs b 1 through b 3 of this section. See 49 CFR part Each tire retreader must conspicuously label at least one sidewall of each tire it retreads by permanently molding or branding into or onto the sidewall, in the manner and location specified by Figure 2, a TIN consisting of seven symbols and containing the information set forth in paragraphs b 1 and b 3 of this section.
Each manufacturer of a non-pneumatic tire or non-pneumatic tire assembly must permanently mold, stamp, or otherwise permanently mark into or onto at least one side of the non-pneumatic tire or non-pneumatic tire assembly a TIN consisting of 13 symbols and containing the information set forth in paragraphs b 1 through b 3 of this section.
Every tire has a date code stamped on the sidewall, which is the date the tire Passenger or truck tires, with their more flexible sidewalls, can result in trailer.
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 Standard Size Michelin, the creator of the radial tire, has great visual that can be seen by clicking the below link:.
Radial Radial is superior to Bias as enables larger footprint, better traction, and reduced fuel. Ply Rating Designates maximum load carrying capacity of a specific size tire at maximum air pressure and speed.
Tire Date Code and How to Read It
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.
Production date. This four-digit code tells you the week and year that your tyre was manufactured.
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.
Determining Tyre Age: DOT Code Explained
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.
If you’ve ever looked over the numbers and letters stamped into the sidewall of your tires, This type of construction dates back to the earliest pneumatic tires.
Tire spec notation varies according to car model but primarily consists of symbols and numbers denoting tire width, aspect ratio, diameter, load index and speed symbol that indicate tire performance. E-mail Share this page to my friends.
Your tire’s information
The Rubber Manufacturers Association said there is no way to put a date on when This Edmunds article about reading a tire’s sidewall goes into greater detail.
Load ratings and speed ratings should be looked at together when you buy a new tyre. The speed rating is the maximum speed for a tyre when it is correctly inflated and being used under load. The speed rating is the letter at the end of the sidewall, after the load index number. When buying new tyres, make sure you match their speed rating with the speed capabilities of your vehicle. To help better understand how to read your tyre’s sidewall, Jon Benson from Tyre Reviews, explains the meanings of the key markings on your tyre.
This means that the tyre is road legal for winter conditions across Europe. Your dealer may help you verifying this before purchasing or fitting tyres. Yes, this may be possible. Is it possible to fit tyres with a higher speed rating and a higher load index than my manufacturer recommends? Is it possible to fit tyres with a higher load index and a lower speed rating than my manufacturer recommends? Check your vehicle owner’s manual to determine the load limits. Overloading your vehicle places stress on your tyres and other critical vehicle components.
DOT Date Code & Tire Age Explained
A frequent question about tire maintenance concerns service life. How long will your tires last before you should replace them? The answer depends on different factors such as your driving style, the tread design of the tire, regional climate, road conditions, and how frequently the car is in use. Another factor is you, the driver. Just like the rest of the vehicle, you have an essential role in the care and maintenance of the tires on your wheels; they will last longer the better you look after them.
You’re also responsible for deciding when it’s time to replace worn tires with new tires.
SERIAL NUMBER. Tire identification number stamped on sidewall of Ag tire indicating manufacturing plant, size, date of manufacture, and certifies compliance.
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. An underinflated tire creates abnormal tire flexing and excessive heat causing: – Ride and handling problems – Decreased fuel efficiency – Reduction of tire life Driving on tires with too much air is also not recommended.
Over-inflated tires are more likely to cut, puncture or fail by sudden impact. How do I determine the age of my trailer tires? Every tire has a date code stamped on the sidewall, which is the date the tire was manufactured. The date code is usually at the end of the DOT I.
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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.
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? It originated in Europe, which uses the metric system. The lower the ratio, the smaller the sidewall height, which means better cornering, but a rougher ride.
Other letters used are D, for diagonal construction, and B, for belted. This number in inches indicates that the tire is designed to fit on a wheel with a inch diameter. This indicates how much weight the tire is certified to carry at maximum safe inflation. This indicates the maximum safe speed at which a tire is certified to carry a load under specified conditions. Exceeding the lawful speed limit is neither recommended nor endorsed.