Decoding your car’s tire information doesn’t require flipping through the owner’s manual. All the information you need is right there on the sidewall. You just have to know how to crack the code. Not only do the jumble of letters and numbers tell you the size of the tire, but they can also tell you how safe your tires are and how old they are, too. Let’s take a look at the tires on Roadshow’s long-term Kia Stinger for example. The biggest stamping on the tire is the brand and model, in this case Michelin Pilot Sport 4.
Dating goodyear tires
The width indicates the widest point of a tire from sidewall to sidewall. Some tires have a P or LT in front of the tire width, identifying them for passenger or light truck use. The aspect ratio is the dimensional relationship of the section height to the section width. Tires with an “R” indicate radial tire construction.
The load index number and speed symbol correspond to the maximum load-carrying capacity of the tire and its maximum speed capability.
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.
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. On the side wall next to the U. DOT tire identification number you will find a 4-digit number. The first 2 digits indicate the week of its manufacture and the last two are for the year.
Tire Safety: Expiration Dates
A new tire on my Bonanza was purchased via mail order in August from a reputable source that was listed in a major aviation trade publication. After checking to determine just how ‘new’ my new tire really was, I discovered that it was already eight years old! Look for a molded-in-plate on the side of the tire. In the plate will be a series of numbers and perhaps some letters.
Learn More About Tire Date and Manufacture Codes at Tire Rack.
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.
How to Read Date Code on Motorcycle Tires
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.
Some tires have a P or LT in front of the tire width, identifying them for passenger or light truck use.
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.
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Each farm tire sidewall includes important information about the size, tread, load index and speed ratings, production code as well as safety and bead seating warnings. These details can help assess tire safety and also inform your next tire purchase. The load index is the two or three digit code that indicates the load carrying capacity of the tire.
Dating to: Read Tire Date Codes No individual manufacturer have come out with a specific old expiration date or period. Motorcycle Tires Age and How to.
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. While they were required to provide the same information as today’s tires, the week and year the tire was produced was contained in the last three digits. The 2 digits used to identify the week a tire was manufactured immediately preceded a single digit used to identify the year. In the example above: 17—Manufactured during the 17th week of the year 9—Manufactured during or could have been or Due to trailer suspension design, there are unique forces such as ” Interply Shear ” placed on multi-axle trailer tires.
You can read more about this on Roger’s blog. The tire manufacturer is assigned a tire plant code that forms the first two digits of the DOT code. In the example picture below, the plant code is AT. The tire was manufactured in England. All Rights Reserved. Determining the Age of a Tire and Reading the Code. Install Your App Now!
How Old Are Your Tires? Check the Born-On Date
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.
When tires get old, the rubber loses is elasticity (gets hard) and then when the The second tire has an extra (circled) set of digits after the date code that read.
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
Understanding Dunlop Tire Codes
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.
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. This optional number is located on the sidewall opposite the DOT number.
Commercial treads also include codes, which are used to detail retread information. This code is generally found on the lower sidewall near the original DOT code.
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If the u. From sidewall, so you informed. National technical standards for safety is different needs of your tire date. You can be different. Interesting facts about motorcycle safety component on your tires.
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