Tire Load Ranges Chart: What the Letters on Your Sidewall Actually Mean
Every tire carries more information than most drivers ever read. Buried in the string of numbers and letters molded into the sidewall is a load range rating — a shorthand for how much weight a tire is built to support and how much air pressure it's designed to hold. Understanding this system helps you verify that your tires are matched to your vehicle's actual demands.
What Tire Load Range Means
Load range is a standardized rating that indicates a tire's maximum load-carrying capacity at its maximum inflation pressure. It replaced an older ply rating system that measured how many layers of cotton fabric made up the tire's internal structure. Modern tires use synthetic materials, so actual ply count is largely irrelevant — but the rating scale carried over.
The higher the load range, the stiffer and stronger the tire's internal construction, and the more weight it can safely support per tire.
The Tire Load Range Chart
| Load Range | Ply Rating Equivalent | Max Load Pressure (PSI) | Typical Application |
|---|---|---|---|
| B | 4-ply | 35 PSI | Passenger cars, light-duty use |
| C | 6-ply | 50 PSI | Light trucks, cargo vans, trailers |
| D | 8-ply | 65 PSI | Medium-duty trucks, trailers |
| E | 10-ply | 80 PSI | Heavy-duty trucks, SUVs, tow vehicles |
| F | 12-ply | 95 PSI | Commercial trucks, heavy haulers |
| G | 14-ply | 110 PSI | Commercial and severe-duty trucks |
Note: These figures represent general industry standards. Always verify the specific ratings printed on your tire's sidewall and confirm against your vehicle's door placard or owner's manual.
Load Range vs. Load Index: Don't Mix Them Up
These two ratings often get confused, but they measure different things.
- Load range describes the tire's structural strength category and maximum pressure capacity.
- Load index is a numerical code (typically stamped nearby on the sidewall) that maps to a specific maximum weight the tire can support — for example, a load index of 100 means the tire can carry up to 1,764 pounds at maximum inflation.
Both numbers matter. A tire needs to meet or exceed your vehicle's requirements on both scales.
Where You'll Typically See Each Load Range
Load Range B tires are common on standard passenger cars. They're designed for everyday driving on vehicles that don't carry heavy loads or tow.
Load Range C tires show up on cargo vans, smaller commercial vehicles, and some light truck applications. If you've ever noticed that a full-size van rides stiffer than a car on the same road, the tires are part of why.
Load Range D and E are where most truck and SUV owners start paying closer attention. Many half-ton and three-quarter-ton pickups come equipped with Load Range E tires from the factory, especially if they're spec'd for towing or payload work. These tires are noticeably stiffer.
Load Range F and G are found on heavy commercial vehicles — think large work trucks, tractor-trailers, and severe-duty haulers.
Why Load Range Matters for Truck and SUV Owners 🚛
For drivers who tow trailers, haul heavy payloads, or operate under load regularly, matching tire load range to actual vehicle demands isn't optional — it's a safety issue.
Running a tire with too low a load range for the weight you're carrying causes excessive heat buildup inside the tire. That leads to accelerated wear, structural fatigue, and in serious cases, blowout risk.
Running a tire with too high a load range isn't dangerous, but it does affect ride quality. Higher load range tires are stiffer by design. On a passenger car that never hauls anything heavy, they can make the ride noticeably harsher without offering any real benefit.
What to Check on Your Own Vehicle
Three places give you the load information you need:
- The tire sidewall — look for the load range letter, typically printed near the tire size code
- The door placard — usually on the driver's door jamb, it lists recommended tire size, load range, and cold inflation pressure
- The owner's manual — confirms what the manufacturer specifies for your specific configuration
If you're replacing tires and considering a different size or brand, the replacement tires need to meet or exceed the load range and load index specified for your vehicle — not just match the physical diameter and width.
Factors That Shift What Load Range You Actually Need
Several variables determine where a specific driver lands on this spectrum:
- Vehicle type and GVWR — a half-ton pickup rated for a modest payload has different needs than a three-quarter-ton truck built to tow
- How the vehicle is used — daily commuting versus regular towing or hauling makes a significant difference
- Trim and configuration — a truck with a towing package may come with higher load range tires than the base model of the same truck
- Trailer weight and type — fifth-wheel and gooseneck setups create different load demands than bumper-pull trailers
- Aftermarket modifications — lift kits, heavier wheels, or added equipment can affect how weight is distributed across the tires
The Part This Chart Can't Settle
A load range chart tells you what the categories mean and what pressures they're rated for. It doesn't tell you which load range belongs on your specific vehicle, given your specific use case, configuration, and load habits. That depends on your GVWR, your actual payload, what your door placard says, and whether you've made any modifications that affect how the truck sits and carries weight. Those are the pieces only you — and your vehicle — can supply.
