Understanding Tire Sidewall Markings: A Guide for Importers

Decoding the Sidewall: Your Tire's Data Sheet

For any professional in the tire wholesale business, the sidewall of a tire is a treasure trove of crucial information. Understanding these markings is not just about technical knowledge; it's essential for preventing costly ordering errors, ensuring compliance with vehicle specifications, and meeting customer demands accurately. Each tire carries a standardized sequence of numbers and letters that tells a complete story about its capabilities and dimensions, serving as the most vital data sheet for any importer.

A Practical Breakdown of Tire Specifications

Let's take a common example of a tire marking: 245/75R16 120/116S. Here’s what each part signifies:

• 245: This is the nominal section width of the tire in millimeters, measuring the tire from its widest point.
• 75: This is the aspect ratio, representing the tire’s sidewall height as a percentage of its width.
• R: This letter indicates the tire's construction type – in this case, Radial.
• 16: This denotes the diameter of the wheel (rim) in inches that the tire is designed to fit.
• 120/116: These numbers are the load index. They represent the maximum weight each tire can carry. The first number (120) is for single-wheel applications, and the second (116) is for dual-wheel applications.
• S: This letter is the speed rating, indicating the maximum speed at which the tire can be operated under its specified load.

Mastering these markings is fundamental. At T.K.M. Auto Tire, our expertise in deciphering these specifications allows us to provide unparalleled support to our wholesale partners, ensuring that the tires we export in your container loads precisely match your regional market's fleet requirements and safety standards.