Reading a Tire Sidewall


As tyres age, they begin to crack in their sidewalls. This happens when UV light oxidises the rubber, causing it to dry out. Although tyres contain anti-oxidising chemicals to slow this process down, these only work when the tyres are moving. Look out for a four-digit code. The first two figures represent the calendar week in which it was made from 1 to 52 and the second two figures are the year of manufacture. So a code of would mean your tyre was made between 28 th March and 3 rd April We recommend that all tyres are replaced when they reach ten years old, regardless of the depth of the tread. Even if the tyre still looks good, we recommend you seek the advice of your local Uniroyal fitter if your car, or your tyres, have been unused for a long period of time. This applies to your spare tyre too.

Tire Sidewall

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

Look on the outer sidewall for the acronym “DOT,” which should be followed by a series of numbers. The last four digits are what you need to.

Providing total tyre supply and service for commercial fleet operators of passenger, light truck, truck and bus fleets. When you’re weighing up the options of purchasing a franchise, one very important consideration is the power of the brand you’re buying into. Helps you to get the most from your investment. Our expert maintenance and care will maximise the life of your next tyres.

Our mission, values and commitment to sustainability and innovation define who we are and drive us to be the global leader in technology. Old tyres can be a ticking time-bomb that could dangerously fail and lose air. Bridgestone explains how. Tyres are made of various types of textile, steel and rubber compounds that have properties that evolve over time. As the rubber in a tyre gets older and is exposed to the elements, the strength of the bond between the rubber and the steel belts is reduced.

Tyre Identification

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.

If you’ve ever looked over the numbers and letters stamped into the sidewall of your tires, This type of construction dates back to the earliest pneumatic tires.

Each new tire manufacturer must conspicuously label on one sidewall of each tire it manufactures, except non-pneumatic tires or non-pneumatic tire assemblies, by permanently molding into or onto the sidewall, in the manner and location specified in Figure 1, a TIN consisting of 13 symbols and containing the information set forth in paragraphs b 1 through b 3 of this section.

See 49 CFR part Each tire retreader must conspicuously label at least one sidewall of each tire it retreads by permanently molding or branding into or onto the sidewall, in the manner and location specified by Figure 2, a TIN consisting of seven symbols and containing the information set forth in paragraphs b 1 and b 3 of this section. Each manufacturer of a non-pneumatic tire or non-pneumatic tire assembly must permanently mold, stamp, or otherwise permanently mark into or onto at least one side of the non-pneumatic tire or non-pneumatic tire assembly a TIN consisting of 13 symbols and containing the information set forth in paragraphs b 1 through b 3 of this section.

Manufacturers or retreaders of tires exclusively for mileage-contract purchasers may, instead of meeting any other requirements of this section, permanently mold into or onto the tire sidewall in lettering at least 6 mm 0. NHTSA will assign to tire manufacturers who were previously assigned a plant code consisting of two symbols a new three-symbol plant code to replace each two-symbol plant code.

A manufacturer may continue to use a previously assigned two-symbol plant code until April 13, Manufacturers who use a two-symbol plant code must comply with paragraph g of this section in lieu of the requirements in paragraph b of this section. Retreaders may also optionally comply with paragraph g of this section in lieu of paragraph b of this section until April 13,

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

The condition of the tires on a car are what determines a car’s capabilities in terms of acceleration, braking and cornering. 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 on it. The date code will let you know when tires need to be replaced. Use a flashlight to find the Department of Transportation code on the tire.

Read the last two digits of the DOT code.

The chronological age of any tire can be found on the tire sidewall by The last four numbers identify the date of manufacture of the tire to the nearest week.

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. But what does it all mean? Fortunately, the answer to this question is yes. Here, a standard set of interchangeability guidelines is governed by The Tire and Rim Association for all manufacturers of tires in the United States.

Tire dating

All new tires sold in the United States must have a DOT number cured into the lower sidewall of one side of the tire. This code has a standard format which has been designated by the federal government. Some manufacturers place an additional code with a specific serial, which identifies the specific tire model a tire type code.

manufactured after “Stamped” on the outer.

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.

Tyre Age – How Old Are My Tyres?

Tires have very useful information molded onto their sidewall. 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 range identifies the tire’s load and inflation limits. Load Index – The load index is a numerical code associated with the maximum load a tire can carry at the speed indicated by its speed symbol under specified service conditions.

The load index should not be used independently to determine replacement tire acceptability for load capacity. Max Load kg lbs and kPa 35 psi Max Pressure Cold — Passenger Example indicates maximum load and maximum cold inflation pressure of the tire.

There are four major components of the sidewall lettering which help to identify the tire: Brand; Product line; Tire Size; DOT serial number/ production date. The.

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.

For example, would reveal that a tire was manufactured during the 52nd week of the year Prior to the year , DOT coding was slightly different. If you have a tire that doesn’t match the coding you see in our example, it was likely manufactured before and should be retired as a safety precaution. It’s always a good idea to have a tire professional inspect your tires when having them reinstalled on your vehicle after storage.

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Every sidewall has its own unique information that is divided into four main sections:. This describes the fundamental characteristics of your tire. Size, construction, speed rating and more. This designates the type of vehicle the tire fits.

Dot Tire Identification Codes. All new tires sold in the United States must have a DOT number cured into the lower sidewall of one side of the tire. This code has.

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. 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.

What do the Red and Yellow dots on my new tyre mean?

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