How to Read Tire Sidewall Markings

You may notice a lot of seemingly random numbers and letters on the sidewall of your tires. Do you need to be concerned with them? The tire sidewall markings actually tell you a lot about your vehicle as a whole. Learn how to read these markings.

What the Tire Sidewall Markings Tell You

Load Carrying Capacity: You can overload your tires much the same way you can overload a backpack or your pockets. The tire markings include the capacity limit. The markings appear in large print right after the diameter marking. This is a two or triple digit number. See this tire load index to see the number’s corresponding capacity in pounds.

Speed Rating: The speed rating usually appears as a single letter right after the load carrying capacity. This speed symbol chart indicates the speed performance of a tire. An “H” rating, for example, means the tire can achieve speeds of 130-mph before it will no longer perform at full capability.

The Three Ts

Modern vehicles have stock tires that undergo the Uniform Tire Quality Grade (UTQG) review. This analyzes the parameters of traction, temperature, and treadwear.

Traction: Every tire has a traction grade, ranging from AA to C. The grade represents a tire’s ability to come to a full stop on wet and slippery roads.

Temperature Grade: Tires also have a temperature grade, located next to the traction rating. This represents how well a tire can resist and dissipate heat.

Treadwear: This is pretty straightforward and refers to the tire’s tread durability and longevity.

We Replace all Tire Types

Come by Chuck’s Auto Repair for tire replacement or related services, such as CV axle and differential maintenance. Summer is here, which means a higher risk of a tire blowout. Now is the time for tire care. Become an informed consumer by learning to read the tire sidewall markings.

Tire Replacement and Servicing

Serving motorists in the greater area Seattle

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