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.

How To Read Your Tire Sidewall

Tire dating. Determining the importance of the basics of your tire logo? Check your sidewall and hellena have been told by dunlop.

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.

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.

It is important to pay attention to these dates as tires can become unsafe if they are stored too long or in poor storage conditions.

Tire Known Unknowns: Decoding the Date

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.

Learn more about “How To Read Your Tire Sidewall” and get the latest news about Prior to year three numbers are used for the date of manufacture, first.

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. The date code on motorcycle tires will help you choose a set that will last for as long as possible. Before , the date code was written in three digits, and was considered logical, as no tire would serve for longer than a decade.

The first pair meant the number of the week, the third number meant the year of the decade. It was much easier with the tires that were manufactured in the s, though. Aside from the 3-digit code, there was a small triangle placed on the sidewall. The study was conducted because of a series of crashes due to tread separation in the early s, which made many major companies, including Ford, recall a number of their tires. After that, manufacturers started to put the hazard information in their manuals, encouraging people to check the date code.

This new rule touches on all other parts of the whole tire code, including the sizing of the tire, its load index, speed rate, etc.

Should auto tires have a sell-by date?

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.

Date Code. Date Codes tell you where your tire was made as well as what week of what year it was manufactured. – Code for manufacturing location.

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 Please keep in mind that remaining tread is not an indicator of tire life as the irregular duty cycle requires that trailer tires sit in extended storage under static load conditions often for long periods without movement or maintenance causing the tire carcass internal structure to break down, a condition undetected by visual inspection.

Tire Sidewall

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.

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.

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 reason for setting up this six-year standard is that some research has shown that after that amount of time passes, tire failures dramatically increase.

Although there isn’t a set expiration date as of yet, companies like Ford Motor Company already encourages its customers to scrap their tires if they’re more than six years old [source: Holguin ]. But how can you determine the age of a tire? You can tell how old a tire is by looking on the tire’s sidewall. There are lots of markings ranging from the type of tire, a speed rating that corresponds to a maximum safe speed your tire can sustain, the size of the tire and also when the tire was made; however, if you look after the Department of Transportation DOT letters, you’ll see another list of numbers.

If the tire was made before the year , you’ll see three numbers after the DOT letters; the last number indicates the year the tire was made. On newer tires, those manufactured in or later, you’ll see four numbers.

How to: Read Tire Date 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.

The California Highway Patrol noted that the tires’ age might have tell owners to replace tires six years after their production date, regardless of tread life.

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.

Tire Age and Usability – Geek Speak #31 at 211

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