Tire age law

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.

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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 On tires that were manufactured in and after, the last four digits indicate the week and year the tire was produced.

The first two digits identify the week and the second two identify the year. However, the identification information is usually on the inner sidewall of tires.

If you purchase new tires today, and the DOT Code was a year ago, your warranty will still begin on the purchase date, not the manufacture date of the tire. If for any reason you are uncomfortable with the age of your tires after looking at the DOT Date code, please call us and we can quickly provide you with a return under our 45 day return policy.

It can take a while for tires to reach tire retailers after being shipped from the manufacturer. Our storage locations are cool, climate-controlled, and dry, preventing any premature aging or damage. Tire aging can be rapidly accelerated by poor storage conditions, so you should be sure the tires you purchase have been properly stored.

A general consensus from various tire industry associations around the world is that tires have a useful service life of six to ten years. As technology changes, there are more materials, and combinations of comounds, to extend tire life and extend wear.

At Tires Easy, we like to err on the side of caution and only sell tires that are seven years old and under. If you consider that the average driver travels 15, miles per year, most tires need to be replaced in 4 years. If your tires were a few years old when purchasing, you would still be well within the accepted tire age range.

This is especially true if the tires receive the proper amount of care and maintenance over the course of their lifetime. Legally, you must replace your tires when the tread depth falls below 1. This keeps your tires at optimal levels of safety. When your tires reach seven years of age, we recommend that you consider replacing them.

Even if the tires look new, it is best to have them inspected by a professional tire installer, so they can properly advise on the safety of the tires moving forward. Spare tires should be checked and replaced as well. For this reason, there is no specific limitation on the age of the tire when it is sold based on its DOT Code. On the contrary, the DOT symbol by itself simply indicates that the tire is approved by the Department of Transportation to be legally used on the road. The Date Code is when the tire was manufactured not when it was approved.

You might also have heard that you should only buy tires that have a DOT code within the current year. As we mentioned earlier, this is often not the case with many tires simply because it takes time for the tire to reach the United States from the manufacturer. As long as the tires have been stored properly, they will be in excellent condition, even if the DOT Date code is a couple of years old. When stored properly and protected from the elements, tires age quite slowly.

While these are the main contributors to excessive tire aging, it would still take years of exposure in the hottest, wettest, and driest climates for the first signs of tire aging to appear. Yes, the rubber gets hard over time as the tire loses its elasticity.

This happens regardless of how much you use your tires over the course of the years.Automate your quotes, axle compliance and permits with Oversize.

See how it works. The proper tires, in good conditions, are essential for safe driving—from compact cars to the largest highway haulers. Tires are expensive, but fines and other costs for operating with a faulty or unsafe tire can be significantly more costly. Failure to adhere to these laws can result in costly fines, lost time, and, worst of all, contribute an accident. Metal wheels are typically limited to farm equipment or industrial uses and are not permitted on highways.

That leaves the basic air-inflated pneumatic tire to carry the load. The tire type is determined by vehicle weight and the type of driving anticipated for the vehicle. Size and ratings for each tire are molded into the side of the tire.

It important to ensure that all tires on a vehicle carry the appropriate size and rating. Finally, mismatched tires on a vehicle can lead to excessive and uneven tire wear as well as changes in the control and handling of the vehicle. Typical tractor trailer trucks traveling on the Interstate and other national highways are limited to 80, pounds gross vehicle weight, typically with 12, pounds on the steering axel and 34, pounds per dual axel group.

A typical tire size is 11R Pounds-per-inch of tire width provides both an indication of tire traction and a measure of load restriction based on rated tire capacity. The pounds—per-inch of tire width are determined by dividing the weight carried on the axle group by the number of tires in the group and dividing that by the manufacturer's rated tire width as indicated on the sidewall of the tire.

For example, the pounds-per-inch for a dual axel group 8 tireslimited to 34, lb. In this example, each tire would have to be rated for a load of at least lb.

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Most commercial truck tires are rated for weights well in excess of 5, lb. For example, a typical new in. In a single-tire application, e. States may limit tire loads on the Interstate System, but not to less than pounds per inch of tire or tread widths.

Tire load limits may not be applied to steering axles but steering axle tires must be rated to carry the actual weight of the steering axle. The most obvious concern for vehicle operators is tread wear that indicates when the tire should be replaced.

tire age law

Tread wear indicators provide an immediate indication of tread wear. Other easily spotted problems with tires include excessive wear or damage where tire cord is visible, under inflated tires, cuts and cracks in the tire and tire sidewalls, bumps or bulges anywhere on the tire, and damage around the edge of the tire bead between the tire and wheel.

The tire should meet the requirements for the vehicle based on the tire labeling. Finally, do not mix radial and bias ply tires. The two types of tires handle and perform differently and can result in poor, unpredictable, and unsafe handling under different conditions. If the tire is over inflated, the contact patch is smaller providing less friction than a properly inflated tire. An under inflated tire has a greater contact area but flexes the tire more than the tire is designed to take and can increase wear.

The greater area also increases the possibility of hydroplaning on wet roads. Tire pressure should be checked using a tire pressure gauge. Kicking a tire or using a tire thumper may indicate a tire that is flat or nearly flat but may not identify a seriously under inflated tire.

Snow and ice can cancel the traction normally provided by the tire tread.The evidence is clear: tires should have an expiration date. Older tires are substantially more likely to fail than newer ones. This is because tires are made mostly of rubber, and rubber degrades with age.

Sunlight, heat, ice, and general wear and tear can accelerate the breakdown of a tire. Once a tire begins to break down, it becomes more likely to fail in the form of a tread separation—often at highway speeds, when the failure is most likely to cause catastrophic injuries or death.

Tire Industry Fighting Legislation to Get Aged Tires Off the Road

For most tires, this expiration date should be six years from the date of manufacture. Tires age dangerously because of a chemical process commonly referred to as oxidation, which simply means that as the tire components are exposed to oxygen, the oxygen particles cause the flexible components of a tire to harden and become brittle. Over time, the tire will simply fall apart under normal stress, just like an old rubber band. Because this process occurs naturally, it does not matter if a tire is being used, stored as a spare, or simply waiting on a store shelf for an unsuspecting consumer.

Inthe average tread life of a passenger car tire was approximately 24, miles. Tire tread life has quadrupled over the last forty years and some currently sold tires promisemiles of tread life. As tread life becomes less of a factor in the service life of a tire, oxidation becomes a more serious concern— particularly in hotter climates, like Texas, Florida, Georgia, and Louisiana which are routinely the hottest states in the United States. Numerous studies written by or for the National Highway Traffic Safety Administration support a finding that tires expire in six years.

You can either obtain a free Tire Facts Report from this website or you can do it the old-fashioned way. If the tire has only 10 digits, the tire was manufactured before the year A current D.

As you can imagine, most consumers either do not know that this code exists or do not understand its significance. However, due to the cryptic code tire manufacturers use on tires, the warnings are of only limited use to consumers.

Nonetheless, the following manufacturers have issued warnings on and newer vehicles about tire aging:. Sadly, these warnings are not retroactively provided to consumers who own older model vehicles that are more likely to have aged or expired tires.

The Tire Safety Group offers a free tool for consumers to check their tires to instantly determine whether a tire is expired or recalled. Share your experiences with our team — we are here to help. Managed By: Avant Garde. What are you riding on? Register Forget Password. Notes: W. Contact Share your experiences with our team — we are here to help. The information provided on this website is provided in good faith and Safety Group, LLC believes it to be accurate.

Although every effort is made to identify and correct any and all errors and omissions, the information provided is supplied without any express warranty and should not be relied on exclusively for the evaluation of the suitability for a particular tire to be placed into service.

Some portions of this website may constitute attorney advertising and are subject to important limitations and guidelines.By stephenJuly 25, in Tires.

I have heard rumors that on certain interstates you can be fined for having out of date tires, and in fact been made to have unit towed to get the tires replaced. Don't know if it was bull or what, but just throwing it out there if there is any truth to it. Many threads on this and other forums have been devoted to this topic. But here is my perspective, the safety of my family, myself, and my fellow motorist is of the utmost importance.

Sorry about the little rant, but now everyone knows how I feel about this matter. I am used to the garage taking care of the tires on the buses I drive thanks I am now informed. I've never heard of any state fining anyone for having "out-dated" tires, but it certainly wouldn't surprise me if one did. A blowout while driving the interstate can ruin you day. Besides safely getting to the side of the road, a blowout can do serious structural damage to your coach.

Just isn't worth it to me. At work, we have to have our box trucks and other large vehicles DOT inspected. There are line items for tread depth and any visual damage to the tires or wheels, but the tire age is not part of it. We had tires on one truck over 11 years old and it passed inspection just fine although I kept trying to get the owner to replace them.

Sorry to come back so soon, not trying to be overly skeptical. I have been in the past not quite so cynical, but as I age, I realize more just how precious life is. Here is some interesting facts from the tire safety group.

My favorite Michelin quote "there is so much riding on your tires". Stephen, sounds like its time to go shopping I even had our Michelin rep involved along with an engineer for advice on what tire would suite me best. Even with 40 years experience as tire engineer and "looking at" tens of thousands of tires, I do not have X-Ray vision.There is more to tire safety than adequate tread depth and proper inflation levels.

Age alone is a major factor in tire safety. As tires age, the rubber dries out and makes them more prone to blowouts and tread separation.

Why old tyres are dangerous, and how to tell the age of your tyre

This applies to new-old-stock tires as well as to used tires. No laws in the United States restrict the age of tires. In states with inspection laws — Florida is not one of them — all that is tested is tread wear. A tire has a useful life of six years. Accordingly, for consumers to get at least two years of useful life from a tire, it should be no more than four years old at the time of purchase.

Unfortunately, retailers can sell tires that are more than six years old. Many are much older, sometimes 15 years and above. These tires are accidents waiting to happen. However, they have resisted calls for tire expiration dates. Profits before people. The last four digits represent the week and year the tire was manufactured. Our law firm is experienced in handling product defect cases such as aged tires. If you or a loved one has been damaged by a tire blowout or separation, please contact us for a free, confidential consultation.For years, people have relied on tread depth to determine when to replace a tire.

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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. In addition to maintaining its air pressure, check for its "birth date. Maintaining the proper air pressure is the most important thing you can do to keep your tires running longer.

These incidents illustrate the potential danger of buying used tires and the perils of driving on aging tires — including those that have never spent a day on the road.

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The rubber compounds in a tire deteriorate with time, regardless of the condition of the tread. For some people, old tires might never be an issue. If you drive a typical number of miles, somewhere around 12, miles annually, a tire's tread will wear out in three to four years, long before the rubber compound does. But if you drive much less than that, or have a car that you only drive on weekends, aging tires could be an issue. Similarly, if you are buying a used car, there's a chance it may be riding on old tires.

The age warning also applies to spare tires and seemingly new tires that have never been used but were produced years ago. Cracks in a tire's rubber begin to develop over time, appearing on the surface and inside the tire as well. This cracking can eventually cause the steel belts in the tread to separate from the rest of the tire. Improper maintenance and heat accelerate the process. Kane and his organization have identified over incidents in which tires older than six years have experienced tread and belt separations — most resulting in loss-of-control and rollover crashes.

These incidents were the cause of fatalities and injuries in Every tire that's on the road long enough will succumb to age. Tires that are rated for higher mileage have antiozonant chemical compounds built into the rubber that will slow the aging process, but nothing stops the effects of time on rubber. Carmakers, tiremakers and rubber manufacturers differ in their opinions about the lifespan of a tire.

Many automakers, including Ford, Nissan and Mercedes-Benz, tell owners to replace tires six years after their production date, regardless of tread life. Tire manufacturers such as Continental and Michelin say a tire can last up to 10 years provided you get annual tire inspections after the fifth year.

The Rubber Manufacturers Association said there is no way to put a date on when a tire "expires" because such factors as heat, storage, underinflation and conditions of use can dramatically reduce the life of a tire.

Here's more on each of these factors:. NHTSA also found that environmental conditions, such as exposure to sunlight and coastal climates, can hasten the aging process. People who live in coastal states and other areas with warm weather should keep this in mind when deciding whether they should retire a tire.

Storage: This applies to spare tires and tires that are sitting in a garage or shop.

tire age law

A tire that has not been mounted and is just sitting in a tire shop or your garage will age more slowly than one that has been put into service on a car. But it ages nonetheless.Because safety is our top priority, the National Highway Traffic Safety Administration and the Department of Transportation want to make sure you have the tools to avoid being in vehicle crashes.

The only thing between you and the road are your tires. TireWise provides drivers with information about buying tires, tire maintenance and labeling, aging, fuel efficiency, and tire retailers.

tire age law

TireWise is also a resource for tire manufacturers, sellers and other partners to provide essential information to consumers for choosing and caring for their tires. This video highlights the importance of checking tire pressure, rotating tires, and checking tire tread.

But we also need your help. Once you've selected the right tires for you and your vehicle, our handbook Congratulations on Your New Tire Purchase PDF, KB can help you locate and record important information that you'll need throughout the service life of your new tires. Many tires are rated by the U. Government on treadwear, traction performance and temperature resistance. Treadwear grades are an indication of a tire's relative wear rate.

The higher the treadwear number is, the longer it should take for the tread to wear down. A control tire is assigned a grade of Other tires are compared to the control tire. For example, a tire grade of should wear twice as long as the control tire. Traction grades are an indication of a tire's ability to stop on wet pavement.

A higher graded tire should allow a car to stop on wet roads in a shorter distance than a tire with a lower grade. Temperature grades are an indication of a tire's resistance to heat. Sustained high temperature for example, driving long distances in hot weathercan cause a tire to deteriorate, leading to blowouts and tread separation. From highest to lowest, a tire's resistance to heat is graded as "A", "B", or "C". Check your owner's manual or the Tire and Loading Information Label located on the driver's side door edge or post to find the correct size for your car or truck.

How well do you take care of your tires?

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Do you keep them properly inflated? Do you check if they're worn? How much do you know about basic tire maintenance and its impact on safety and fuel consumption? Proper tire pressure is the most important part of maintaining your tires.

It affects safety, their durability, and your fuel consumption. Tire tread provides the gripping action and traction that prevents your car or truck from slipping and sliding, especially when the road is icy or wet. Having your tires balanced and a wheel alignment performed by a qualified technician is important for the safety of your vehicle and to maximize the life of your tires.

To maintain tire safety, purchase new tires that are the same size as the vehicle's original tires or another size recommended by the vehicle manufacturer. If you have any doubt about the correct size to choose, consult with the tire dealer.

They can find the correct size tire for your vehicle. Remember: The vehicle manufacturer's recommended tire inflation pressure is the proper psi pounds per square inch or kPa kilopascals—the metric measure used internationally when a tire is cold, meaning it has not been driven on for at least three hours.

To get an accurate tire pressure reading, you must measure tire pressure when the tires are cold or compensate for the extra pressure in warm tires. If you have been driving your vehicle and think a tire is underinflated, fill it to the recommended cold inflation pressure indicated on your vehicle's tire information placard or certification label.