what do the numbers on a car tire stand for
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Tire Size Markings Passenger Car Tire. The first letter indicates the tire’s class. P designates this tire as a passenger car tire. An LT before the tire size would mean the tire is a light truck tire. A European metric tire would have no letter before the tire size.
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Tire Speed Rating Explained A letter from A to Z symbolizes a tire’s certified speed rating, ranging from 5 km/h (3mph) to above 300 km/h (186 mph). This rating system, listed below, describes the top speed for which a tire is certified. It does not indicate the total performance capability of a tire.
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- Car Tire Sizes Explained: What The Numbers and Letters on Your Tires Mean. The next number following the slash (/) indicates the height of the tire in a percentage of the section width. In our example, the number is 70, which means the tire height is 70% of the section width, which is 215 millimeters.
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- Of course, we always recommend using the same manufacturer for all your tires, but there’s another incredibly important factor to consider: speed rating. Speed ratings tell you the maximum speed a tire can safely sustain for 10 minutes. You’ll find your tire’s speed rating—a letter between ‘A’ and ‘Z’—on the sidewall. It’ll appear at the end of a series of numbers and letters such as P 205/55 R16 89H. For example, a ‘T’ speed rating, common on family vans and sedans, has a 190 km/h maximum speed.
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What do the numbers on tires mean? There's a massive amount of information branded on the sidewall of every tire ... but it's written in code. The tire size is just one small piece of this code. The tire size P225/45R17 91V may not mean much to the average person, but to tire geeks like us it speaks volumes. Read on to learn how to crack the tire code with this handy guide dedicated to tire types, sizes, and construction. Tire service type ratings. Most tire sizes begin with one or more letters -- for example, P or LT.
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What Do The Number On The Car Tires Mean? When you have a look at the tire of the car, you will notice that the numbers are written in the following pattern: P215/50R17. What is the Meaning of the First Letter? The first alphabet on the tire can be P, LT, ST or T. Sometimes there is the absence of the first alphabet. The first alphabet denotes:
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- How to Identify Tire Manufactures December 9, 2002. (Updated 12/13/08) DOT Markings. Essentially the DOT marking serves as the tire's fingerprint. DOT signifies that the tire complies with U.S. Department of Transportation Tire Safety Standards, and is permitted for highway use. For example refer to the following markings: DOT M5H3 459X 064. The first letter and number following DOT designate the tire's manufacturer and plant code.
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What can happen if i put different tires on my car? I will try to break down the numbers of the tires for you. 205 and 195 are a measurement of the tread width in MM. 60 is the height of the sidewall in a percentage of the the tread width (either 60% of 205mm or 60% of 195mm) and 14 is the measurement of your rim.
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What does the writing on the side of a tire mean? The 60 is the aspect ratio of the tire. That means that the sidewall (the part of the tire that extends from the car's wheel to the edge of the tread) is 60% of the width of the tire's tread. In our example case, then, the sidewall measures 12.3 cm from the wheel to the tread, measured radially.
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Tire Size Guide The 50 indicates that this tire size's sidewall height (from rim to tread) is 50% of its section width. The measurement is the tire's section height, and also referred to as the tire's series, profile or aspect ratio. The higher the number, the taller the sidewall; the lower the number, the lower the sidewall.
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- The tire also contains a D.O.T. number. The last four digits show the year and week that the tire was manufactured. e.g., a tire stamped 3202 means the tire was made in the 32nd week of 2002. Hopefully, it will not be too difficult to tell the difference in a tire made in 1992 from one made in 2002. Tires suffer from sunlight, ozone, and aging deterioration.
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Tire size 225/40R-18XL 92H BSW what does this mean? Best Answer: 225 is the Section Width, or the width of the tire measured from its widest point in millimeters. It is not, as is commonly believed the Tread Width. Diferent tires of the same section width can have different tread widths. 40 is the Section Height or how tall the tire is measured from the Bead to the top of the Tread expressed as a percentage of the Section Width. In this case 40% of 225mm.
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Tire Size Tire Width is the width of the tire measured in millimeters from sidewall to sidewall. The first three-digit number in the tire size refers to the tire width. For instance, in a size P215/65 R15 tire, the width is 215 millimeters. Aspect Ratio is the ratio of the height of the tire's cross-section to its width. 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. Construction.
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What Does H/T Mean for Tires? The codes on the sides of tires are unfamiliar to most car and truck owners, but knowing what the codes mean is important to choosing the proper tires. The H/T on tires stands for highway/terrain. An H/T tire is designed for vehicles that are driven primarily on highways, but that will also be used at times off road.
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Tire code Section Width: In this case it is 185. The first number is the width of the tire in millimeters, measured from sidewall to sidewall. Aspect Ratio: In this case it is .60. The second number is the aspect ratio. This is a ratio of section height height to section width.
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Tire code 2- or 3-digit number: The aspect ratio of the sidewall height as a percentage of the nominal section width of the tire. If the information is omitted, it is assumed to be 82% (if written, it should be like xxx/82). If the number is larger than 200, then this is the diameter of the entire tire in millimeters.
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- Reading tire date codes. 1  Located on the tire sidewall near the edge of the rim. 2  Part of a long alphanumeric serial number starting with DOT. 3  Date codes are the last three or four digits at the end of the DOT safety code.  The first one or two digits indicate the week the tire was manufactured.
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How are car tires measured? There are three numbers, example: 225/60/16 The first number is the width of the tread in mm. The second number is the length of side wall height, it is the percentage of the tread width, example: 225/60/16 means sidewall length is 60% of 225 millimeters The third number is the size of the rim in inches.
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How Old â and Dangerous â Are Your Tires? The second two represent the year. A tire with a DOT code of 1109 was made in the 11th week of 2009. Tires with a three-digit code were made prior to 2000 and are trickier to decode. The first two digits still tell you the week, but the third digit tells you the year in the decade that it was created.The hard part is knowing what decade that was.or years, people have relied on a tire's tread depth to determine its condition. But the rubber compounds in a tire deteriorate with time, regardless of the condition of the tread. An old tire poses a safety hazard. For some people, old tires might never be an issue.
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Tire Size 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. Construction.
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- Rating Newest Oldest. Best Answer: 225 is the Section Width, or the width of the tire measured from its widest point in millimeters. It is not, as is commonly believed the Tread Width. Diferent tires of the same section width can have different tread widths. 40 is the Section Height or how tall the tire is measured from the Bead to the top of the Tread expressed as a percentage of the Section Width. In this case 40% of 225mm.
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What do the numbers on tires mean? P = P-Metric (Example: P215/65R17 98T) P-Metric tires are the most common type of tire. The P stands for passenger vehicle, meaning that these tires are designed for use on passenger vehicles like cars, minivans, light-duty pickup trucks (¼ ton or ½ ton capacity), and SUVs.
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How to determine the age of your tires The date of manufacture is the last three digits of the code. The first two digits refer to the week within that year. For example, if the last 3 digits are 022, it means that the tire was manufactured in the second week of the year, and the year is the second year of the decade.or tires manufactured in the year 2000 – present. The date of manufacture is the last four digits of the DOT code. The first two digits are the week of manufacture, and the last two digits are the year.
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- New Tire: The DOT number appears on the sidewall of all tires intended for sales in the U.S., and designates the location of manufacture, the week and year of production, and the specific tire.
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Tire Size Guide P225/50R16 91S. The 50 indicates that this tire size's sidewall height (from rim to tread) is 50% of its section width. The measurement is the tire's section height, and also referred to as the tire's series, profile or aspect ratio. The higher the number, the taller the sidewall; the lower the number, the lower the sidewall.
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- Clearance. The numbers in the tire size refer to its width, aspect ratio, and wheel diameter. 205/55R16 means the tire is 205 mm wide, has an aspect ratio (that is, the width divided by the height) of 55%, and fits on a 16 rim.R means radial tire.