what does the numbers on a tire mean
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- 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. They're all radials nowadays.
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What Do The Number On The Car Tires Mean? In the above blog, there is a mention of a complete guide that will help you know what different numbers on tire indicate. Now you can not only buy a tire without even consulting any expert but also be a pro and explain the importance of different numbers on the car.
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Sears Corporate Office Headquarters HQ DOT Codes-also known as the Serial Number or the TIN (Tire Identification Number): I get a lot of questions about how old a tire is. You can tell that-and a lot of other things-by reading (and decoding) the DOT code. First locate the letters DOT on the sidewall of the tire. Nearby will be the DOT code. DOT codes are 10 to 13 digits long. BTW the digits can be numbers or letters.
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- CHDs are responsible for one third of all birth defect-related deaths and sadly 20 percent of children who make it through birth will not survive past their first birthday. Although a child is born every 15 minutes with a CHD, research continues to be grossly under-funded in America. Of every dollar the government spends on medical funding, only a fraction of a penny is directed toward congenital heart defect research.
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- This value is the width of the tire from side-wall to side-wall as measured in millimeters. This measurement is usually obtained from the bead of the tire (where the tire mounts to the rim.) /70 The two digit number just to the right of the slash (/) is what is referred to as the aspect ratio.
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Tire code To take a common example, 195/55R16 would mean that the nominal width of the tire is approximately 195 mm at the widest point, the height of the side-wall of the tire is 55% of the width (107 mm in this example) and that the tire fits 16-inch-diameter (410 mm) wheels.
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What do the sidewall markings on my tire mean? 16 - This number designates the tire's diameter in inches (i.e. 16) 89 - This number indicates the tire's load-carrying capacity, known as the Load Index; as the number for the load index increases so does the load-carrying capacity (All passenger car tires in the United States are also marked with their actual load limit in pounds)
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Frequently Asked Questions What does “load index” actually mean and what for example, do the numbers 85 or 86 stand for? The tire load index is an international code that tells you the maximum load that an individual tire can bear. When fitting new tires, the load index should always be the same or have a higher rating.
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Deciphering the Age of a Tire using the Tire Identification Codes XXXXXXXX 0500. 05 – Manufactured during the 05th week of the year. XXXXXXXX 0670. 7 – Manufactured during the 7th year of the decade. With the earlier format of the serial number, you could identify that a tire was manufactured in the 8th year of a decade, however there was way to tell which decade. An exception to this is that a tire that was produced during the 1990s decade might have a small triangle after the Tire Identification Code.
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How To Find Your Tire Size How to Read a Tire Sidewall. Once you find the series of numbers on your tire’s sidewall, use the diagram above and the list below to find the meaning of each number. Metric, or tire type, defines the proper use of the tire. For example, a P designation means that it is a passenger car tire. An LT designation is for a light truck.
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- A typical tire measurement is given in three parts. Ex. 255/55/R17 This measure ment means: Tire width in mm/Aspect Ratio/ Radial design on a 17 inch wheel. The aspect ratio … is the width/height of the tire.
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Car Tire Numbers Explained â What Do The Numbers Mean? Car tire numbers explained – Tires will have something similar like this printed on the side of it: P215/65R17 95H The first letter means type of tire for certain vehicles. P = Passenger vehicles tire
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How to Read Speed Rating, Load Index & Service Descriptions The first two digits (87S) represent the tire's load index and are followed by a single letter (87S) identifying the tire's speed rating. Using a P195/60R15 87S tire size as our example, the 87S at the end of the size represents the tire's service description. A service description identifies the tire's load index and speed rating. Service descriptions are required on all speed rated (except for Z-speed rated) tires manufactured since 1991. The first two digits (87S) represent the tire's load index and are followed by a single letter (87S) identifying the tire's speed rating.
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How To Find Your Tire Size An LT designation is for a light truck. Tire width is the width of the tire measured in mm from sidewall to sidewall. This tire width is 215 mm. Rim diameter is the width in inches or cm of the wheel from one end to the other.The diameter of this wheel is 16 in. Always replace a tire on a rim with another tire of exactly the same rim diameter designation and suffix letters. Speed rating tells you the maximum service speed for a tire.A speed rating isn't, however, a recommendation to exceed speed limits, and doesn't indicate how well a tire handles or corners.n LT designation is for a light truck. Tire width is the width of the tire measured in mm from sidewall to sidewall. This tire width is 215 mm. Rim diameter is the width in inches or cm of the wheel from one end to the other.
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How Tires Work Each section of small print on a tire's sidewall means something: Tire Type The P designates that the tire is a passenger vehicle tire. Some other designations are LT for light truck, and T for temporary, or spare tires. Tire Width The 235 is the width of the tire in millimeters (mm), measured from sidewall to sidewall.
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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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- 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.
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- The speed rating is described on the tire sidewall. Many tire manufacturers currently include the speed symbol in the tire size description. Example: P225/70 H R15 Speed Symbol. In this example the H indicates that the tire is capable of sustained speeds up to 130 MPH.ires certified for Z speed ratings (top speeds over 149 MPH) will continue to be identified by including the speed symbol in the size designation since the top speed for a Z rated tire is determined in accordance with the manufacturer's vehicle specifications.
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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.inally, the 15 means that the tire will fit on a 15-inch wheel. This means that the diameter of the wheel is 15 inches. I don't know who came up with this strange mix of metric, English and ratio measurements, but it's been this way for many years. Hope that helps.
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U.S And Metric Tire Size Information Calculator The 195 is the tire width in millimeters, measured from the bottom of the bead to the bottom of the bead, the 70 is the sidewall aspect ratio, the ratio of sidewall height to tire width at the tread (indicating that the sidewall height is 70% of the tread width), and the 15 is the wheel rim diameter in inches.
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What Does Z Mean On The Tires …P245/40R18 or LT315/70R17. But what does it mean when the tire says P245/40ZR18? For that, you need to know a little bit about speed ratings. Speed ratings on tires are expressed in letters and are generally listed along with the load index for a tire after the size, for instance….
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- In this example, the sidewall height is 55 percent of the tire's width, which is 205 mm. The number is known as the tire's series; a sporty tire with shorter sidewalls would be considered a lower-series tire. Off-road tires tend to be higher-series, designed to absorb the impact from rough surfaces.05 (the first number) is the tire's width in millimeters. 55 (the number following the slash) is a measure of the tire's profile — the height of its sidewall relative to its width — expressed as the sidewall's aspect ratio in a percentage.
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- SPEED SYMBOLS. The speed symbol determines. the maximum speed allowed for. the rated loads of the tire. From. the table above, A8 means the. maximum speed allowed for the. rated load of the tire is 40 km/h. or 25 mph.
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How To Find Your Tire Size Once you find the series of numbers on your tire’s sidewall, use the diagram above and the list below to find the meaning of each number. 1  Metric, or tire type, defines the proper use of the tire.  Tire width is the width of the tire measured in mm from sidewall to sidewall.
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- 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.