What does 155R13LT tire mean?
2 Answers
155 represents the "section width" of the tire, which is the width at its widest point in millimeters. R stands for radial construction, 13 is the rim diameter in inches, and LT indicates a light truck tire. Explanation of tire specification parameters: The international standard tire code expresses the section width and aspect ratio as a percentage in millimeters, followed by the tire type code, rim diameter (in inches), load index (permissible load capacity code), and permissible speed code. Taking 215/70R15 as an example: The meanings of 215/70R15 are as follows: 215 indicates the tire section width in millimeters, with intervals of 10mm; 70 is the aspect ratio, which is the ratio of the tire sidewall height to the tire section width, with 70 representing 70%. Generally, the aspect ratio of tires ranges between 30% and 80%. Under normal circumstances, ordinary cars should not use tires with an aspect ratio greater than 75%, while luxury cars and high-performance sports cars are recommended to use tires with an aspect ratio less than 60%. R is the abbreviation for Radial, indicating that the tire has a radial structure, and 15 is the outer diameter of the rim in inches.
I've been running an auto repair shop for many years and often get asked what 155R13LT tires mean. Simply put, 155 stands for a tread width of 155 millimeters, R indicates radial construction, 13 refers to a 13-inch rim diameter, and LT means Light Truck tire. These tires are designed to carry heavier loads, making them suitable for pickup trucks and small vans that haul more cargo. They're more durable and robust than regular passenger car tires. I've serviced quite a few pickups using this specification—they have strong load-bearing capacity and are less prone to bulging on long trips. But I should remind everyone that if used on private cars, comfort may be compromised, and the tires can be noisier. When choosing tires, make sure to match the vehicle type and avoid mixing to prevent safety hazards. Regular checks on wear and tire pressure can extend their lifespan.
