The meaning of the various numbers and letters that appear on the tire cheeks.

The meaning of the numbers and letters that appear on the tyre cheek, which is the international standard for tyre specification. The sample code is P 185 / 70 R 14 88 T, detailed below:

1.P - Tire Usage Code (Usage Type Code)

The first letter tells of the type of car this tire is designed to use.

• P (Passenger Vehicle): For Passenger Vehicles

• LT (Light Truck): For Pickup Truck or Light Truck

• C (Light Commercial): For small commercial vehicles

• T (Temporary): For temporary use spare tire

2.185 - Tire Width (Rubber Front Width)

• The width of the tire that touches the floor of the road is measured in millimeters (mm).

3.70 - Aspect Ratio (Rubber Series / Rubber Cheek)

• Is the height of the rubber cheek as a percentage (%) of the width of the tire.

• How to Calculate Rubber Cheek Height: (Rubber Front Width ✍ 100) × Rubber Series

• Example: (185 × 100) × 70 = 129.5 mm

4.R - Radial Construction (Rubber Structure)

• R (Radial Tire): It is a radial tire, the most popular structure today.

• B (Bias Belt / Cross Plastic): is oblique canvas structure rubber

5.14 - Rim Diameter (Wheel Pan Diameter)

• The size of the wheel that this tire can wear is measured in inches.

6.88 - Load Capacity Code (Weight bearing index)

• It's a code that tells how much weight one tire can carry.

• From the table in the image, code 88 means that the tires carry 560 kilograms per line.

7.T - Speed Rating (Maximum Speed Limit)

• The last letter tells the maximum speed at which the tire can run safely.

• From the Speed Rating table in the image, the letter T indicates a maximum speed of up to 190 km / h (Note: In the Speed Symbol table, T indicates 190 km / h, but some points indicate 200 km / h. However, the international standard of T is usually 190 km / h).

Summary from image .png: This tire is a passenger car tire with a width of 185 mm, a height of 70% of the tire face, a radial tire for wearing 14-inch rim wheels, a maximum weight of 560 kg and a maximum speed of 190 km / h.