Capital Auto Parts Blog

When it comes to choosing the right tires for your vehicle, there's more to consider than just the size and brand. Tire load ratings, often denoted by the tire load index and load range, are critical factors that ensure your tires can safely carry the weight of your vehicle and its cargo. In this guide, we'll explore the tire load rating chart, decode the load index, and understand the load range to help you make informed decisions about your tires.

Understanding Tire Load Index

The tire load index, represented by a number on your tire's sidewall, indicates the maximum weight a tire can safely support. This number corresponds to a specific load capacity in pounds or kilograms. The higher the tire load index, the greater the weight it can bear.

Here's a quick reference to some common load index values:

• Load Index 70: 739 pounds (335 kilograms)
• Load Index 80: 992 pounds (450 kilograms)
• Load Index 90: 1,323 pounds (600 kilograms)
• Load Index 100: 1,764 pounds (800 kilograms)
• Load Index 110: 2,205 pounds (1,000 kilograms)

You'll find your vehicle's recommended load index in the owner's manual or on a placard inside the driver's door or door frame. It's crucial to match the load index of your tires with the vehicle manufacturer's recommendations to ensure safe and reliable performance.

Tire Load Range: Adding Another Layer of Safety

Load range, often denoted as a letter (e.g., Load Range C, D, E), provides additional information about a tire's load-carrying capacity. Each load range corresponds to a range of load indexes and inflation pressures.

Here's a simplified breakdown:

• Load Range C: Designed for light-duty applications, such as passenger cars and some smaller SUVs. These tires typically have a lower load-carrying capacity and inflation pressure range.

• Load Range D: Suitable for larger SUVs and trucks, with a higher load-carrying capacity than Load Range C. They can handle heavier loads and require higher inflation pressures.

• Load Range E: Intended for heavy-duty trucks, vans, and commercial vehicles. These tires have the highest load-carrying capacity and inflation pressures in the load range chart.

How to Use the Tire Load Rating Chart

1. Check Your Vehicle's Load Index: Refer to your vehicle's manual or the placard on the door frame to find the recommended load index.

2. Choose the Right Load Range: Based on your vehicle's load index, consult the load range chart to determine which load range is suitable for your vehicle. Ensure that the load range matches your vehicle's load-carrying requirements.

3. Consider Your Driving Conditions: Think about your typical driving conditions and load-carrying needs. If you frequently carry heavy loads or tow trailers, it's advisable to choose a tire with a higher load index and load range.

4. Consult a Professional: If you're unsure about the right load index and load range for your vehicle, seek advice from a tire professional or the tire manufacturer.

Load Index vs Maximum Load Capacity Pounds Chart (LBS)

In conclusion, understanding tire load ratings, including the tire load index and load range, is essential for safe and efficient driving. A tire load rating chart provides valuable information to help you choose the right tires that match your vehicle's specifications and load-carrying requirements. By following the manufacturer's recommendations and using the load index and load range as your guide, you can ensure that your tires are up to the task and keep you safely on the road.