What do the letters mean on tires?
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. Consult a load and speed index to find out what your tire’s specific rating means.
What do letters and numbers on tires mean?
Load index and speed rating Also known as the service description, the number indicates the maximum load the tire can support when inflated properly, and the letter represents the maximum speed capability of the tire.
How do you read a tire code?
The last four digits of this code tell you when your tire was manufactured. The first two numbers indicate what week of the year it was made (out of 52 weeks per year), and the second two numbers represent the year. For example, 5200 would reveal that a tire was manufactured during the 52nd week of the year 2000.
What does R mean on tires?
radial construction
R indicates the construction used within the tires casing. R stands for radial construction. B means belted bias and D stands for diagonal bias construction. 17 The last dimension listed in the size is the diameter of the wheel rim, which is most often measured in inches.
How do you date code tires?
Remember that the last four digits of the code are the date the tire was manufactured. You can check the first two digits of the DOT code to know the week of the manufacturing. The last two digits will reveal the manufacturing year. For instance, when it was written in 0203, the manufacturing year was 2003.
What is T and H speed rating?
The most popular, S, T, and H, are rated for 112, 118, and 130 mph, respectively. Traditionally, most family cars have used S- and T-rated tires, while tires rated H and higher have mostly been available only in sports cars or upscale sports sedans.
What does 115 t mean on tires?
The 115T signifies that the tire has a 4ply standard load sidewall. The standard load tire is best for a half ton truck, whereas the load range E sidewall is best for a 3/4 and 1 ton truck.
What does P mean on tires?
P identifies your tire as a Passenger Tire. The P stands for PMetric. If your tire size starts with LT rather than a P than it identifies the tire as a Light Truck tire. For example, this aspect ratio of 50 means that the tire’s section height is 50% of the tire’s section width.
How to read tire codes?
– Tire Class. The tire class is indicated at the beginning of the tire code. Typically, you’ll see the letters P, LT, or ST, or no letters at all. – Tire Width. The three-digit number following the tire class is the tire width. The width is the distance of the tire from sidewall to sidewall in millimeters. – Aspect Ratio. The next number, which comes after the forward slash, is the tire’s aspect ratio. – Construction Type. The set of letters after the aspect ratio indicates the tire’s construction. For a P185/75 R17 82S tire, the “R” means the tire has a radial construction. – Wheel Diameter. The next set of numbers is the wheel diameter, or the distance from one end of the wheel to the other. – Load Index. The last section of numbers refers to the tire’s load index, which is how much weight the tire can handle if inflated properly. – Speed Rating. The last letter of the tire code is the tire’s speed rating, which is the max speed the tires are rated for in ideal conditions. – Treadwear, Traction, & Temperature. Along with the tire code, every tire lists the ratings for treadwear, traction, and temperature. – Tire Compounds. Tire compounds are usually made of a combination of natural and synthetic rubbers. – Tire Tread Patterns. Another thing you want to consider when choosing your next set of tires is the tread pattern.
What are the codes for tires?
Tire code. Automobile tires are described by an alphanumeric tire code (in American English and Canadian English) or tyre code (in British English, Australian English and others), which is generally molded (or moulded) into the sidewall of the tire. This code specifies the dimensions of the tire, and some of its key limitations,…
How do you read tire numbers?
How to Read Your Tire. The first two numbers or letters after the DOT indicate the plant where the tire was manufactured. The next four numbers indicate the date the tire was built, i.e., the number 1210 indicates that the tire was manufactured in the 12th week of 2010. These are the most important numbers in the TIN,…
How to read a tire?
Read the manufacturer and the tire name. These are printed in large letters toward the outside of the tire.