Readers ask: What Does The Imprinted Barcode On The Side Of An Automotive Tire Mean?

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What do the markings on the side of a tire mean?

The two-digit number after the slash mark in a tire size is the aspect ratio. For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire’s width. The bigger the aspect ratio, the bigger the tire’s sidewall will be.

How do you read a tire sidewall code?

How To Read A Tire Sidewall

  1. TIRE SIZE.
  2. P identifies your tire as a Passenger Tire.
  3. 225 identifies the tire section width, which is the measurement of the tire from sidewall to sidewall in millimeters.
  4. 50 is the two-figure aspect ratio.
  5. R indicates the construction used within the tires casing.

What do the letters and numbers on the side of a tire mean?

The number is the load rating, or the amount of weight that it can handle. The letter is the speed rating, or the maximum speed the tire is built for. As an example, a tire rated 90R could safely carry 1,323 pounds and travel at 106 mph.

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What do tire symbols mean?

There are two common grading systems for tires to help identify winter tire traction capabilities. All tires that pass certain winter tire traction tests can be marked with a symbol molded onto the side of the tire. One is the M+S (mud and snow) symbol, and the second is the mountain/snowflake symbol.

Does it matter which side of a tire faces out?

Does it matter which side of a tire faces out? Generally no, it does not, unless you have a vehicle that is equipped with directional tires, also called unidirectional tires. Directional tires have a specially designed tread pattern that has a distinct V shape at the center of the tread like the one pictured below.

Can I use 235 tires instead of 225?

Obviously, you will need a certain kind of tire depending on how you use your vehicle. Due to this, a 235 tire might not be better than a 225 tire, or vice versa, but depending on your situation, one tire might serve you better than the other.

Is it safe to drive on a tire with sidewall damage?

It is never safe to drive on a tire with sidewall damage and that is because as you drive, the puncture, hole, or injury to the sidewall of the tire becomes bigger and worse, thereby putting yourself and other road users at risk due to possible sudden tire blowouts.

What does the letter at the beginning of a tire code represents?

Put another way: the first letter tells you exactly what kind of vehicle a tire is compatible with. “P” stands for passenger vehicle (cars, vans, SUV’s, and pickup trucks). “LT” is an abbreviation for “light truck.” “T” indicates it is a temporary spare that should only be used for a little while when you have a flat.

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What is sidewall damage?

Sidewall tire damage is defined as tire damage that encompasses issues and deficiencies with the side or wall of your vehicle’s tires. You may have huge chunks of rubber that are missing from your tire. You may also have deep and huge abrasions that are due to you hitting curbs.

What does the 4th number on a tire mean?

So if the tire markings indicate P225/45R17 91V, it means that the height of the sidewall is 225 multiplied by 0.55 or 101.25 millimeters. The number 45 means that the height is equal to 45 percent of the width.

What does the Z mean on tires?

A “ Z ” rating can mean different things. While it nearly always means a high performance tire for high-performing sports cars, “ Z ” may actually appear in the middle of a tire’s size information. When it does, it represents either a maximum speed of more than 149 mph (240 kph) or 186 mph (300 kph).

What does XL mean on a tire?

If you own a car that often carries heavy loads, or is a multi-purpose vehicle’s, e.g. a minivan, it is possible that the vehicle manufacturer originally installed Extra Load ( XL ) or reinforced tires. These tires have stiffer sidewalls than normal tires, which allow them to support the weight of heavier vehicles.

What does the tire warning sign look like?

Tire – pressure warning lights are typically located in the gauge cluster of an automobile’s dashboard. Warning lights are usually yellow or amber and resemble a cross section of a tire with an exclamation point and/or the letters ” TPMS.” (You can see one in the photo above, just to the left of the speedometer.)

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What do the 3 numbers mean on tire size?

B: TIRE WIDTH The three -digit number following the letter is the tire’s width (from side to side, looking at the tire head on) in millimeters. It’s the height of the sidewall measured from wheel rim to top of the tread, expressed as a percentage of tire width. In other words, it’s sidewall height divided by tire width.

How do you decode tires?

The two-digit number after the slash mark in a tire size is the aspect ratio. For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire’s width. The bigger the aspect ratio, the bigger the tire’s sidewall will be.

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