Load Range D is a weight rating that tells you how much weight one tire can safely carry at a given air pressure

Tire load range is a letter code — A, B, C, D, E, F — stamped on the sidewall of your tire. It indicates the maximum weight that single tire can support when inflated to its rated pressure. Load Range D means that tire can carry more weight than a Load Range C tire, but less than a Load Range E tire. The letter itself does not tell you the exact weight; you have to look up the specific number on the tire's sidewall or in the manufacturer's chart.

Load Range D tires are common on pickup trucks, SUVs, and vans — vehicles that regularly carry passengers, cargo, or tow trailers. A passenger car typically uses Load Range B or C. If you put a Load Range B tire on a truck that needs Load Range D, the tire can overheat and fail because it is being asked to carry more weight than it was built for. Conversely, using Load Range D on a car that only needs Load Range B is not dangerous, but it is unnecessary and costs more.

Key Takeaways

  • Load Range D appears as a letter on your tire's sidewall and indicates that tire's maximum weight capacity at its rated air pressure.
  • Load Range D tires are designed for trucks, SUVs, and vans that carry heavier loads than typical passenger cars.
  • You must match your vehicle's load range requirement to your tires; using a lighter load range can cause tire failure under load.
  • The exact weight capacity of a Load Range D tire varies by tire size and manufacturer, so check the sidewall or the tire maker's load index chart.

Where to find the load range on your tire

The load range letter is printed on the sidewall of every tire, usually near the tire size. It appears after a slash or as part of a longer code. For example, you might see "LT235/85R16 E" or "P265/70R17 C". The letter at the end is the load range. On some tires, especially light-truck tires, you will see "LT" at the start of the size code, which indicates a light-truck tire — these often come in Load Range D or E.

If you cannot find the load range on the tire itself, check your vehicle's door jamb label (usually on the driver's side door frame) or your owner's manual. These sources list the tire size and load range your vehicle manufacturer recommends. You can also contact the tire retailer or the tire manufacturer with your tire size, and they will tell you the load range and weight capacity.

How load range differs from tire size

Tire size and load range are two separate things. Two tires can be the same size — say, 265/70R17 — but have different load ranges. One might be Load Range C and another Load Range D. The size tells you the width, sidewall height, and wheel diameter. The load range tells you how much weight that tire can handle. You need both pieces of information to choose the right tire for your vehicle.

A larger tire does not automatically have a higher load range. A smaller tire with reinforced sidewalls might have a higher load range than a larger tire with lighter construction. This is why you cannot straightforward assume a bigger tire is stronger. Always check the load range code on the sidewall or in the manufacturer's specifications.

Why your vehicle has a specific load range requirement

Your vehicle's weight, the weight it typically carries, and how the suspension is built all determine what load range tire it needs. A pickup truck that tows trailers or carries heavy cargo needs Load Range D or E because the total weight on each tire is higher. A sedan that carries four people and light luggage needs only Load Range B or C. Using a lighter load range than required puts stress on the tire's structure, causing it to flex too much, overheat, and potentially fail while driving.

The manufacturer's recommendation is based on testing and engineering. If your vehicle's door jamb label says Load Range D, that is the minimum load range you should use. You can use a higher load range (like E) if you want extra durability, but you should not go lower.

Load range versus load index

Load range and load index are related but different. Load range is the letter (A through F). Load index is a two- or three-digit number that appears on the tire sidewall and corresponds to a specific weight capacity in pounds or kilograms. For example, a tire might have Load Range D and a load index of 120, which means it can carry 1,389 pounds at its rated pressure. You need both the load range letter and the load index number to know the exact weight capacity.

The load index is more precise because it gives you the actual weight in pounds. The load range is a broader category. If you are comparing two Load Range D tires, they might have different load index numbers, meaning one can carry slightly more weight than the other. Always check the load index number if you need to know the exact capacity.

What happens if you use the wrong load range

Using a tire with a load range lower than your vehicle requires is the main risk. The tire will flex more than it should, generate excess heat, and wear faster. In extreme cases, the tire can fail suddenly — a blowout — especially if you are towing, carrying heavy cargo, or driving on a hot day. The tire's sidewalls are not reinforced enough to handle the load safely.

Using a load range higher than required is safe but unnecessary. A Load Range E tire on a vehicle that needs Load Range D will work fine; it is just more expensive and may ride slightly stiffer. The real danger is going the other direction — using Load Range C on a truck that needs Load Range D.

How to check your vehicle's load range requirement

The easiest place to find your vehicle's load range requirement is the door jamb label on the driver's side door frame. Open the door and look at the label attached to the frame. It lists the tire size and load range recommended by the manufacturer. Your owner's manual also contains this information, usually in a tire or maintenance section.

If you are buying replacement tires, tell the tire retailer your vehicle's year, make, and model, and they will look up the correct load range for you. You can also call the vehicle manufacturer's customer service line with your vehicle identification number (VIN), and they will confirm the load range requirement. Never guess or assume; the cost of looking it up is zero, and the cost of a tire failure is high.

Frequently Asked Questions

Can I use Load Range E tires if my vehicle needs Load Range D?

Yes. Load Range E tires are stronger and can handle more weight, so they are safe to use on a vehicle that requires Load Range D. You will pay more for them, and they may ride slightly stiffer, but there is no safety risk. The danger is the opposite — using Load Range C when you need Load Range D.

What does the number after the load range letter mean?

That is the load index, a two- or three-digit number that corresponds to the tire's weight capacity in pounds or kilograms. For example, load index 120 equals 1,389 pounds. You need both the load range letter and the load index number to know the exact weight your tire can carry.

If my tire sidewall says LT, does that mean it is Load Range D?

No. "LT" means light-truck tire, but it does not tell you the load range. Light-truck tires can be Load Range C, D, E, or F. You still need to look at the letter code on the sidewall to find the load range. The "LT" just indicates the tire is built for trucks and vans rather than passenger cars.

Does load range affect how the tire rides or handles?

Load range affects sidewall stiffness. A higher load range tire has reinforced sidewalls, so it may feel slightly stiffer and less comfortable on smooth roads. The difference is usually small, and the trade-off is durability and safety under load. Most drivers do not notice a significant change in ride quality.

What if I cannot find the load range on my tire?

Check your vehicle's door jamb label or owner's manual first. If the tire is very old or worn, the sidewall printing may be faded. Contact the tire manufacturer with your tire size, or visit a tire retailer who can look it up in their system. You can also provide your vehicle's year, make, and model, and they will tell you what load range you need.