Understanding Dunlop Tire Codes
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.
Tyre Age – How Old Are My Tyres? Once a tire begins to tire down, it becomes more likely to fail in the tires of a tread separation—often at highway dating, when.
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 Kane said he’s tracked hundreds of catastrophic failures in tires over six years old. He said tires begin to break down and weaken over time, especially if exposed to extreme heat, like there is in Charlotte. Eyewitness News found what may be evidence of that type of aging on a four-year-old tire being sold as new on clearance at a Walmart in Matthews.
You could see the drying and cracked, discolored rubber. Kane said to watch out for tires sold on clearance. He said age could be the reason they’re marked down.
Read Motorcycle Tire Date Codes in 5 Seconds
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.
Effect of Text Format on Determining Tires’ Date of Manufacture, accepted by And in , the agency mentioned tire age as a hazard in a.
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.
The resulting “dry rot” leaves tire structure brittle and leads to sidewall damage and eventual failure. This isn’t “Oh I’ll just fill it up and drive on it. As a precaution, the Department of Transportation recommends changing even new-looking tires once they hit 10 years old, and many manufacturers recommend swapping them out at six years old. Of course, this aging is highly dependent on where the tires live. Tires in hot dry climates have much shorter lives than those in moderate, moist climates.
Still, you want to maximize tire life when buying a new set of rubber. Tires in hot dry climates have much shorter lives than those in moderate. Since tires can sit in a warehouse for years, you’ll want to know when the tires were made, rather than purchased, and there’s an easy way to tell. Every tire has a “born-on date” molded into the sidewall and coded according to federal requirements. Near the edge of the rim, look for a long serial number starting with the letters “DOT.
PUT YOUR KNOWLEDGE TO PRACTICAL USE
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.
Tires are composed of various types of material and rubber compounds, It is impossible to predict when tires should be replaced based on their calendar age recommended that any tires 10 years or older from the date of manufacture.
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.
9 Investigates: Some experts say date on tire age code is very important
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.
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.
Blog , North America , Sailing. Once a tire begins to tire down, it becomes more likely to fail in the tires of a tread separation—often at highway dating, when the failure is most likely to cause catastrophic tires or death. The dating motorcycle tires is different from automobiles but the one you reported still looks strange to me. Tires age dangerously because of a chemical process commonly referred to as oxidation, old simply means that as the tire components are exposed to oxygen, the oxygen particles tire the flexible components of a tire to harden and become brittle.
Tire Manufacture Date Before The Tire Identification Number for tires produced prior to was based tires the assumption that tires would not be in service for ten years. The week and year may be missing in the code tire one side of the tire. If you like my site about tire, please click on the Like button.
Tire manufacturers put the end of warranty at old 5 years after date of how so it is better to watch the you buy. How dating life has quadrupled over the last forty years and tire currently sold tires promise , dating of tread life.
Where can I find my tires’ age?
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.
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.
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. The first two numbers indicate the week out of 52 and the last two digits indicate the year.
For example, means the tire was manufactured the 34th week of
How Old Are Your Tires? Check the Born-On Date
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.
You can tell the age of your tires by checking their manufacture date. You can find this information on the sidewall of the tire. Somewhere near.
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.
Sidewall markings are given in both metric and English Engineering units. Department of Transportation U. DOT tire-safety performance standards. The first two characters are the factory code indicating where the tire was made. The last four digits are numbers identifying the week and year of manufacture example: “” means the third week of the year If a tire DOT ends in only three 3 digits, the tire was manufactured before January and should be removed from service and be scrapped because it is over 10 years old.
In several formats, the letters “M” and “S” indicate the tire is intended for limited mud and snow service.
DOT Date Code & Tire Age Explained
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.
The average life of a tire is five to seven years. If you drive a vehicle every day, you’ll probably wear out the tread in less than five. RVs spend most of their time sitting still. So your tires will probably need to be replaced before the tread wears out. Maybe it’s cracks from the sun or maybe it’s sitting too long with too little air in them. When your tires hit fives year in age, it’s time to think about replacing them.
It’s even more important with the kind of weight and load that your RV puts on them.
How to Read Date Code on Motorcycle Tires
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.
How To Determine The Age Of Your Tires. Along with understanding tire basics like pressures, tread depth, and tire type, you should know the age of your tires.
The structural integrity of a tire can degrade over an extended period of time. When that occurs, tires are more prone to catastrophic failure, which could, at best, cause an inconvenience, or, at worst, lead to a crash. The degradation of a tire occurs over time, mostly the result of a chemical reaction within the rubber components. That aging process can be accelerated by heat and sunlight.
Does climate have an effect on the aging of tires? NHTSA research suggests that tires age faster in warmer climates. Exposure to high ambient temperatures can accelerate the tire aging process, which could contribute to tire failures, including tread separations. Environmental conditions like exposure to sunlight and coastal climates, as well as poor storage and infrequent use can hasten the aging process. Are some vehicles more prone to tire aging problems? Tire aging is generally not an issue with vehicles that are driven regularly.
Tires will wear out and need to be replaced before aging becomes a safety concern. But those with occasional use – like recreational vehicles or collector cars, for example – could be susceptible.