Enthusiasts Here's everything you can learn from reading a tire sidewall

04:15  08 august  2018
04:15  08 august  2018 Source:   cnet.com

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Everything you need to know about your tires is right there on the sidewall , you just have to know how to crack the code. Luckily, no math is needed here . On some tires you may see the note "M+ S ," which means the tire has been rated for mud and snow.

There’ s more to your tire ’ s sidewall than just the size. Continue Reading . Technology News tracked by Arador.

a red car parked on the side of a building: The 2018 Stinger wears Michelin Pilot Sport 4 rubber.© CNET The 2018 Stinger wears Michelin Pilot Sport 4 rubber.

Everything you need to know about your tires is right there on the sidewall, you just have to know how to crack the code. Knowing this information can help you determine how safe your tires are, how old they are, or help you decide what you want out of your next pair of car shoes.

Let's take a look at the tires on Roadshow's long-term 2018 Kia Stinger for example.

Read on for The biggest stamping on the tire is the brand and model, in this case Michelin Pilot Sport 4. On this particular tire, there is also a note of "outside." This indicates that the tires are asymmetric and have a change of tread pattern across the tire that can disperse water while also maintaining dry grip.

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There is a lot to learn from the seemingly random assortment of numbers and letters on your tire 's sidewall . Here ' s everything you need to know about Starbucks' earnings.

Everything you need to know about tire sizes and how to read a tire sidewall . Learn why tire types and dimensions matter in our simple guide. Here ' s an explainer on what all the sidewall numbers and letters mean.

Size matters

You might be confused by the following string of letters and numbers: "255/35 ZR19 (96Y)." That looks like someone's email password, doesn't it? 255/35 indicates that the tire is 255 millimeters wide, with a 35-percent sidewall aspect ratio. In other words, the height of the sidewall is 35 percent of the tread width.

Yes, tires make you do math.

Multiply 255 by 0.35 to get an 89.25 millimeter sidewall height. If you want to convert either of those numbers to inches, divide by 25.4, the number of millimeters in an inch. These tires are 10 inches wide and have a sidewall height of 3.5 inches.

The "Z" indicates a speed rating of over 149 mph. There's more to it, however, and I'll explain the rest a bit further on.

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Tires have a lot of writing down the side of them, but what does it all mean??? We explain everything you need to know. Learn more. You 're viewing YouTube in English (US). You can change this preference below.

Learn the meaning behind all the letters and numbers on the side of your tire - tire type, dimension, aspect ratio, wheel diameter, treadwear rating, and

"R" tells us that the tire has a radial construction. Radials are by far the most common type of passenger-car or truck tire, where the plies are situated perpendicular to the direction of travel.

In rare cases, perhaps if you drive a classic car on vintage-spec tires, you may see a "D" here, which indicates a diagonal or bias-ply construction. In these tires, the plies overlap each other on a diagonal.

No, those letters and numbers aren't random.© Provided by CBS Interactive Inc. No, those letters and numbers aren't random.

You may also see the designation "F" after the construction-type symbol. This means the tire is a run flat and can be driven at slower speeds for a short distance after a puncture -- even after a complete loss of air pressure. Typically, the guideline in such scenarios is 50 mph for 50 miles.

"19" simply means the tire should be mounted on a wheel with a rim diameter of 19 inches. Luckily, no math is needed here.

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Be respectful, keep it clean and stay on topic. We delete comments that violate our policy, which we encourage you to read . Next Article: Here ' s everything you can learn from reading a tire sidewall .

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On some tires you may see the note "M+S," which means the tire has been rated for mud and snow. You may also see a three-peak mountain graphic with a snowflake, indicating the tire is a step above an M+S tire for foul-weather performance.

It's important to note that neither of these symbols means the tire is specifically designed for mud or snow, just that it's been engineered to handle greater amounts of the slippery stuff than tires that don't have these markings. If you plan on driving in the deep snow or mud, you should consider a more specialized winter or off-road tire, respectively.

Locked and loaded

After the tire's size, you'll see its service description, here indicated by "(96Y)". The number is the load index. The higher the number, the more weight the tires can handle. In this case, "96" means the tire can handle 1,565 pounds, while the "Y" indicates the tire is rated to be safe at speeds up to 186 miles per hour.

But what about that "Z" rating mentioned earlier? "Z" means that the tire has been tested over 149 mph, but doesn't indicate how far over. The "Y" rating basically puts the cap at 186 mph. Except here, the designation is in parentheses, indicating that the tire has been tested above 186 mph. However, again it doesn't indicate how far over 186 mph that testing was done.

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There is valuable information in that code on the side of your tire . Learn how to read it so you can use it when you need it. The first number is the width of the tire in millimeters from sidewall to sidewall .

Learn more. Опубликовано: 15 мар. 2016 г. Cristy Lee breaks down everything you need to know about how to read the information on your tire sidewall , and what it means about your tire .

These speed ratings might matter to folks who take their Lamborghini Huracán to the track and have the capability of going over 186 mph, but for most of the driving public, a Y-rated tire, parentheses or no, should be more than sufficient for all street use.

If you'd like to see what the ratings are for your particular tire, Tire Rack has a few excellent charts here.

Born-on date

The Department of Transportation leaves its mark on tires as well. On the sidewall, you'll find DOT followed by a series of numbers that indicate such things as manufacturing location and specs. However, the most important numbers are the last four, indicating the week and year the tire was made. In this case "1417" means it was made between April 3-9, 2017.

The Department of Transportation is trying to communicate with you.© Provided by CBS Interactive Inc. The Department of Transportation is trying to communicate with you.

The Department of Transportation is trying to communicate with you.

Emme Hall/Roadshow

This information can be useful when assessing whether tires need to be replaced (which can be particularly helpful when shopping used cars). If the tires are over five years old, regardless of tread depth, it's time to get them inspected, and most likely replaced.

This born-on dating can also be helpful when attempting to figure out if your tires are affected by a recall.

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Learn more. The sidewall of your tire contains all the important information about it. Yokohama Tire Tips #2 - How to Read a Tire Sidewall - Продолжительность: 3:29 Yokohama Tire 42 126 просмотров.

Tak from Toyo Tires gives us some insight on how to read a tire size. His simple explanation addresses all the different specifications that are written on your vehicles tire . The sidewall of a tire contains a couple of key features

Wear and tear

The Uniform Tire Quality Grade Standards are also molded on the tires, indicating treadwear, traction and temperature tolerances. While the tests to determine these criteria rely on standards set by both the DOT and National Highway Traffic Safety Administration, the testing itself is performed by the manufacturer, or an outside company it hires.

Treadwear testing is done on a controlled test track over 7,200 miles, and the resulting rating is comparative in relation to the test tire. A treadwear rating of 100 means the test subject is estimated to last as long as the test tire. Ergo, a tire rated at 200 promises to last twice as long as the test tire, but wear out twice as quickly as a tire rated at 400.

These Michelin Pilot Sport 4 tires get good UTQGS ratings all around.© Provided by CBS Interactive Inc. These Michelin Pilot Sport 4 tires get good UTQGS ratings all around.

Frankly, UTQGS isn't always the best way to determine probable wear, as the test tire runs through so few miles and wear will vary based on driving style and real-world conditions. Tire manufacturers' treadlife warranties are often a more useful indicator of projected life.

Traction rating designates a tire's wet stopping ability. The Michelins get the highest rating of AA, but you might see A, B or C here.

The temperature rating grades the tire on its ability to resist heat. A tire that can't dissipate heat will not be able to run safely at high speeds. The law requires a minimum grade of C, but the Michelins fitted on this particular Stinger go to the top of the class with an A grade.

To the max

Maximum load and tire pressure information must be marked on every tire sold in the United States. On these tires, we see noted "Max Load 710 kg" (1565 lbs) and "Max Press 340 kPa" (50 psi). This is not the same thing as the recommended tire pressure. For that information you should refer to the owner's manual or the information sticker on the driver's side door jamb.

a close up of a car: If you don't want to look up the load rating, it's also written out right on the tire.© Provided by CBS Interactive Inc. If you don't want to look up the load rating, it's also written out right on the tire.

You may also see an "E" with a number in a circle followed by some numbers. This means the tires meet European specifications, which vary slightly from US standards. Other codes include NOM for Mexico, CCC for China, SNI for Indonesia and N superimposed over an I for Brazil.

There is a lot to learn from the seemingly random assortment of numbers and letters on your tire's sidewall. Now that you know how to crack the code, you'll be able to take better care of your tires, or figure out when it's time to invest in new ones.

This was originally published on Roadshow.

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