Truck Tire Size Chart: The Ultimate Guide To Choosing The Right Size

Customs factory tire size for 1952 chevy truck The H.A.M.B.

Did you know that choosing the wrong truck tire size can not only affect your vehicle’s performance but also compromise your safety on the road? With so many options available, it can be overwhelming to find the perfect fit for your truck. That’s why we’ve created this comprehensive guide to help you navigate the truck tire size chart and make an informed decision. Let’s dive in!

Understanding Truck Tire Size Chart

Before we get into the nitty-gritty of choosing the right tire size, let’s first understand how the truck tire size chart works. It may look like a jumble of numbers and letters, but each component has a specific meaning. Here’s a breakdown:

Tire Type

The first letter in the tire size code indicates the type of tire. For trucks, it’s usually “LT” for light truck or “ST” for special trailer.

Tire Width

The three-digit number after the tire type denotes the tire width in millimeters. The wider the tire, the more surface area it has to grip the road.

Aspect Ratio

The two-digit number after the tire width represents the aspect ratio or the height of the tire’s sidewall as a percentage of its width. A lower aspect ratio means a lower profile tire with better handling, while a higher aspect ratio provides a smoother ride.

Construction Type

The next letter indicates the construction type of the tire. It can be “R” for radial or “B” for bias-belted. Radial tires have better traction and longer tread life, while bias tires are more durable and better suited for heavy loads.

Rim Diameter

The last two digits denote the diameter of the wheel in inches that the tire is designed to fit.

How to Choose the Right Truck Tire Size

Now that you understand what the tire size chart means, how do you choose the right size for your truck? Here are some key factors to consider:

Truck Type and Usage

The size of the tire you need will largely depend on the type of truck you have and how you use it. A heavy-duty truck used for hauling will require a different size tire than a light-duty truck used for commuting.

Driving Conditions

Think about the environment you’ll be driving in. If you frequently drive on rough roads or in extreme weather conditions, you’ll need a tire with better traction and durability.

Load Capacity

The load capacity of the tire needs to match the weight of the truck and the load it carries. Overloading a tire can cause it to wear out faster or even fail, leading to a potential accident.


Tires come in various price ranges, so it’s important to set a budget and stick to it. While cheaper tires may save you money in the short term, they may not last as long or perform as well as more expensive ones.


Choosing the right truck tire size is crucial for your vehicle’s performance and safety. By understanding the tire size chart and considering factors such as truck type, driving conditions, load capacity, and budget, you can make an informed decision. Don’t hesitate to seek advice from a tire professional if you’re unsure. Remember, your tires are the only contact point between your vehicle and the road, so choose wisely!

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