What is the Shelf Life of Car Tires?

Luckily, you maintain control and safely maneuver to the side of the road. The tires are new, purchased a few months ago from a local tire shop. How could this happen to new tires? The fact is that all tires have an expiration date. Surprisingly, many consumers and sellers of tires do not know about tire expiration dates. An uninformed consumer thinks he or she purchased brand new tires when in reality those tires may have been sitting on the shelf for years. Even though the tires were never used on a vehicle, they are still several years old. Every tire has a birth date—the day it was manufactured—and an expiration date that is six years from that manufacture date. Most automobile manufacturers warn drivers to replace vehicle tires after six years. To wait any longer than that is a gamble with tire integrity and is risky for drivers.

Replacing tires

The sidewall of your tires is filled with important information that tells you everything about your tire regarding the dimensions, construction, operating characteristics and manufacturer. The easiest way to understand tire markings is to take an example and break it down. The absence of a letter at the beginning of the size description indicates that the tire is Euro-Metric.

The fact is that all tires have an expiration date. Driving on outdated tires is risky not only for the driver of the car having those tires but also for.

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.

Tire Sidewall

Summer tyres. Winter tyres. All-season tyres. Bridgestone Tyres.

how to read a tire date along with other information on your tires can tell you a lot about your tire’s health and help you make important decisions for your car.

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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.

The evidence is clear: tires should have an expiration date. Older tires In , the average tread life of a passenger car tire was approximately 24, miles.

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them. Registered in England and Wales. Number Wayne Wenzel Nov 09, SRS President Sean Kane said rubber can begin to degrade after six years even if the tires have never been used. It turns out most passenger vehicle tires already have a date stamped on them. The date is a small tag placed in the mold and it is formed into the tire sidewall when cured.

These usually have the week of manufacture and the year although some manufacturers might use weeks based on a fiscal year. Here is engineer Jay Wheeler’s response:. Firestone stamps manufacture dates on farm tires too right now we are in week 45 so you will see the number We also code the tires with the particular curing press and side, if dual cavity, but that means nothing to the consumer.

All rubber is subject to ozone depletion, and that produces cracking. Any old tractor tire will show this.

Watch Out for Old Tires

Our website uses cookies to place bookings and help us provide a better service. By browsing this site you accept cookies used to improve personalisation and marketing. Find out more in our updated privacy policy or review your cookie settings. To help identify the age of your tyres, each one is imprinted with a coded date which tells you when that tyre was manufactured.

The four-digit tyre age code is usually located in a window on the tyre sidewall.

The rubber on a car tire degrades over time, and tire warranties can be tied to manufacturing dates. Every tire sold in the United States has a date code stamped.

The chronological age of any tire can be found on the tire sidewall by examining the characters following the symbol “DOT”. The last four numbers identify the date of manufacture of the tire to the nearest week. The first two of these four numbers identify the week of manufacture which range from “01” to “53”. The last two numbers identify the year of manufacture e.

For tires manufactured prior to the year , three numbers instead of four indicate the date of manufacture. We recommend: All tires including spare tires that were manufactured more than ten years ago should be replaced with new tires, even if they appear to be usable from their external appearance and if the tread depth may have not reached the minimum wear out depth.

Switch now to summer tires from Continental. You are here: Homepage Technology Tyre knowledge Tire age. Tire age What do you need to know about the age of your tires?

How Old Are Your Tires? Check the Born-On Date

Knowing if your car has TPMS will enable you to find the right tires. Not sure? Enter your phone number to receive a text message with a link for this information. The number will not be used for any other purpose. Carrier charges may apply for receiving text messages.

This designates the type of vehicle the tire fits. P is for passenger metric. Other letters are LT (for light truck), T (for temporary spare) and ST (for special trailers).

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. I also had no idea that tires have a manufacture date stamped on them. It turns out that tires have cryptic codes on them. Since , the week and year the tire was produced has been provided by the last four digits of the Tire Identification Number with the 2 digits being used to identify the week immediately preceding the 2 digits used to identify the year.

While the entire Tire Identification Number is required to be branded onto one sidewall of every tire, current regulations also require that DOT and the first digits of the Tire Identification Number must also be branded onto the opposite sidewall. The use of a partial Tire Identification Number on the one sidewall shown above reduces the risk of injury to the mold technician that would have to install the weekly date code on the top sidewall portion of a hot tire mold.

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 2 digits used to identify the week a tire was manufactured immediately preceded a single digit used to identify the year.

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JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser. Tire age is a tricky subject at Coker Tire, because we manufacture NEW tires that look like old tires. There can be some confusion in regard to tire age, and that’s why we wanted to put together this guide to decoding your tire and therefore determining the tire’s age. The tire industry has some loose guidelines on tire age that call for tire replacement after 6 to 10 years of service.

When it comes to determining the age of a tire, it is easy to identify when a tire was to install the weekly date code on the top sidewall portion of a hot tire mold​.

I agree to the use of cookies and tracking mechanisms which are used to analyse my activity on this website in order to improve my user experience. Find out more. A tires sidewall protects the carcass on the inside and provides a comfortable riding experience due to its flexibility during cornering. The type of tire, size, structure, tread pattern, manufacturer, brand name and other detailed information are marked on the sidewall.

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 Information Message. Clear Fields. Tire Sidewall A tires sidewall protects the carcass on the inside and provides a comfortable riding experience due to its flexibility during cornering.

Date-stamped tires

Please read and accept the Tire Selector terms of use, link. P identifies your tire as a Passenger Tire. The P stands for PMetric. This measurement varies depending on the rim to which it is fitted. This percentage compares the tire’s section height with the tire’s section width. R indicates the construction used within the tires casing.

To help identify the age of your tyres, each one is imprinted with a coded date Low mileage, older cars tend to be most at risk from premature ageing – as.

If you’ve ever wondered how old your tires are, it’s an easy bit of information to find out. Tires actually have a “born-on” date, and it’s listed right on the tire itself. Almost everything you need to know about your tires is molded into the sidewall and coded according to federal requirements, including the specific week and year when a tire was made. To read the date on a tire, look near the edge of the rim for a series of characters starting with the letters DOT. This code can tell you the manufacturer of the tire and the factory where it was made, as well as provide lot-specific information used for tracking in case of a recall.

The last four digits of this code tell you when your tire was manufactured. The first two numbers indicate what week of the year it was made out of 52 weeks per year , and the second two numbers represent the year.

What Is DOT Date Code on Tires? With Willie B of Two Guys Garage


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