Federal safety regulators suggest replacing tires after six years, regardless of use. Danielle Escalante courtesy: Escalante family. But in June , the back tire blew out on the President George Bush Turnpike, according to an incident report. Escalante said she never hit any debris. The National Transportation Safety Board deemed aging tires a safety concern in a report released in But the National Highway Safety Traffic Administration has stopped short of requiring the industry to print an expiration date. In a statement, the U. Tire Manufacturers Association argues the life of a tire cannot be predicted by age alone.
Understanding Dunlop Tire Codes
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.
However, overtime manufactures figured that consumers could use the date codes to determine the age of a tire and replace it before it became.
How old are my tires? DOT date code tells you. Are you concerned about the age of your tires? Worry no more! After this quick guide you will clearly understand how to find the manufacturer date of your tire and how tire age is handled based on the DOT date code. To find your tires are you need to find the DOT date code on the tire. Find the raised DOT letters and numbers. Look for 4 numbers together, often enclosed in a raised oval. The first 2 numbers are the week the tire was manufactured, for instance in the example below, 35 stands for week The second two numbers are the year the tire was manufactured.
Deciphering the Age of a Tire using the Tire Identification Codes
To read the date code on motorcycle tires, you must find the 4-digit part of the DOT code on the sidewall of a tire. The first pair of numbers means the week, and the second pair means the year. So, if you are wanting to determine the age of a tire with the code , you should read its manufacture date as the 35 th week of This is the standard form for every date code on motorcycle tires made since The aging process depends on the environment and usage conditions, type of rubber, purpose of the tire, etc.
But, make sure to remember a tire can be stored in a shop for 2 years or even more.
Each tire has a code on it that will tell you when it was made. Some experts say that date is very important and that tires should not be used.
A new tire on my Bonanza was purchased via mail order in August from a reputable source that was listed in a major aviation trade publication. After checking to determine just how ‘new’ my new tire really was, I discovered that it was already eight years old! Look for a molded-in-plate on the side of the tire. In the plate will be a series of numbers and perhaps some letters. Aircraft tires manufactured by Goodyear are clearly marked with an eight-character serial number code that represents the year, Julian date of production, and tire ID number.
Character one represents the year; character two, three, and four indicates the day; characters five, six, seven, and eight signify the individual tire ID number. FYI: The Julian calendar dates are simply a continuous count of days. For example: January 1 is expressed as ; December 31 is expressed as McCreary tires are marked with an eleven-digit code.
Michelin aircraft tires are marked with a ten-digit serial number that also represents the year and Julian date that the tire was produced. Character one represents the last number of the manufacturing year; the next three numbers indicate the Julian day and the remaining six characters are related to decade of production, manufacturing facility and production number. For example: P 9 is for , is the Julian day – 29 July, P pertains to the facility and decade, is a unique production number.
Retread tires have the original manufacturers date and they are also marked with month and year of retread. But how do you know if the tire was made in of ?
Read Motorcycle Tire Date Codes in 5 Seconds
If not — you should. They may last another three years, but your tread has little to do with it. What is more essential is the age of the tire. Tires are made of rubber, obviously, and when rubber gets old, it starts to dry and crack often times from the inside out — this process is not always visible to the naked eye. Until recently, I had no idea that the age of the tire mattered.
I thought it was all in the tread and visible cracking.
All Dunlop tires also specify the date of manufacture on the sidewall. It is important to pay attention to these dates as tires can become unsafe if.
The DOT number, an alpha-numeric code found on the tire sidewall, has consistently confused consumers and tire professionals. The last four characters of the character code contain the week and year the tire was made. For example, signifies that the tire was made during the third week of Tires made prior to used a three-digit date configuration at the end of the DOT code.
In those cases, signifies that the tire was manufactured during the third week of — or the A change is necessary because safety is involved, particularly the tire aging issue. One limiting factor to making the date more apparent and easier to use is that tire manufacturers are currently required to give the DOT number as specified by law.
How Old is This New Tire?
Each farm tire sidewall includes important information about the size, tread, load index and speed ratings, production code as well as safety and bead seating warnings. These details can help assess tire safety and also inform your next tire purchase. The load index is the two or three digit code that indicates the load carrying capacity of the tire.
Deciphering the Age of a Tire using the Tire Identification Codes in use since the year will accurately confirm the year of a tires manufactured on date.
So how can you tell the age? The Tire Identification Codes is found on the sidewall of a tire and is a batch code that identify which week and year the tire was produced and as a result what raw material was batched into that process. Requirements set forth by the U. On tires manufactured today, the week and year in which the tire was manufactured is within in the last four digits of the serial number , with the 2 digits used to identify the week a tire was manufactured followed immediately by the 2 digits identifying the manufactured in year.
Examples of tires manufactured since with this Tire Identification Code format:. The Tire Identification Code on a tire that was produced before was based on the idea that a tire would not be in service for more than a total of ten years. However these days, that can be un-realistic especially with collector cars and recreational use vehicles. Yet even under that idea manufacturers were required to provided this same information, with the week and year that the tires were manufactured within those last three digits.
In this case though 2 digits used to identify the particular week a tire was made immediately followed by a single digit that identified the year.
How to: Read Tire Date Codes
Tires, like most other auto parts, are built to withstand a great deal of wear and tear. Unlike other car parts, however, tire manufacturers always give an estimate for about how long a tire should last. The estimates themselves can range greatly for each tire, but you’ll usually see a manufacturer listing of how many tens of thousands of miles you may expect out of that particular tire.
When it comes to car part longevity, however, there are always circumstances when the auto part information given by a manufacturer may not apply. In the case of tires, the estimate of how long a tire can last is based primarily on the tread wear. But some safety advocates want to add an expiration date of six years onto each tire, regardless of how much tread is left on them.
The fact is that all tires have an expiration date. Surprisingly, many consumers and sellers of tires do not know about tire expiration dates.
Since , the week and year the tire was produced has been provided by the last four digits of the Tire Identification Number TIN with the 2 digits being used to identify the week immediately preceding the 2 digits used to identify the year. If you don’t visibly see the DOT tire code with the date code from the outside view, then you’ll need to view the other side of the tire.
The Tire Identification Number for tires produced prior to was based on the assumption that tires would not be in service for ten years. While they were required to provide the same information as today’s tires, the week and year the tire was produced was contained in the last three digits. The 2 digits used to identify the week a tire was manufactured immediately preceded a single digit used to identify the year.
In the example above: 17—Manufactured during the 17th week of the year 9—Manufactured during or could have been or Due to trailer suspension design, there are unique forces such as ” Interply Shear ” placed on multi-axle trailer tires. You can read more about this on Roger’s blog. The tire manufacturer is assigned a tire plant code that forms the first two digits of the DOT code.
In the example picture below, the plant code is AT.
How Old — and Dangerous — Are Your Tires?
Most people buy new tires without bothering to check if they are really new. Tires are stored in warehouses, and they may be several years old by the time you buy and install them on your car. Then there is the question of how long you should keep the tires on your car. Over time, the rubber in the tires will deteriorate due to environmental exposure.
Date/Time UTC, DOT, Tire age, Country. , , 4 years 4 months 3 days, Saudi Arabia. , , 1 year 5 months 3 days.
Each tire has a code on it that will tell you when it was made. Some experts say that date is very important and that tires should not be used after a certain number of years. Some experts argue that tires over six years old could be dangerous and vulnerable to a catastrophic blowout, no matter how much tread is left. Eyewitness News went tire shopping with our hidden cameras.
At the Walmart on Wilkinson Boulevard, Eyewitness News quickly found tires several years old being sold as new. Then we spotted a code that made us look twice — a tire that was made in the spring of , and another made in summer
Tire Date Code and How to Read It
Tires have very useful information molded onto their sidewalls. 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 index should not be used independently to determine replacement tire acceptability for load capacity. The load range identifies the tire’s load and inflation limits.
The manufacture date is located on the sidewall of the tire, displayed as a four-digit number; the first two are for the week and the last two for the year.
The alpha numerical coding on the sidewall of Dunlop motorcycle tires can be confusing. It is important to understand these codes to insure you are getting a safe tire that will work on your particular motorcycle. Dunlop tire codes utilize metric measurements. Metric sizing is the most widely used and has the most information.
Simply put, the higher this number is, the taller the tire will be. In this case, the tire is 65 percent as tall as its width. If there are two letters after the aspect ratio, the first will be speed rating and the second will be tire construction. If there is only one letter or a dash – after the aspect ratio, then it indicates construction type and the speed rating will appear in the service description.
The service description is a combination of the load index 81 and the speed rating H. All Dunlop tires also specify the date of manufacture on the sidewall.