Tire Load Rating Explained
Understand truck tire load rating basics without treating a web page as a load and inflation table.
Truck Tire Load Ratings
Use this section when the question is not “what size fits?” but “can this tire carry the actual axle load in this position?”
Field Use
A tire can match the wheel and still be wrong for the axle. The working check is axle load, tire count, single or dual rating, wheel rating, GAWR, and the tire maker load/inflation table. Ply rating shorthand from older shop conversations maps to a load range letter — and that letter points to a specific max inflation and capacity range — but the manufacturer's table for the actual tire model is the only reliable source for the working pressure and rated load at a given inflation.
Quick Checks
- Use a real loaded axle weight when possible.
- Check single and dual ratings separately.
- Do not use tire capacity to raise GAWR.
- Treat example math as a screen, not approval.
- Verify load range from the sidewall marking, not from ply rating conversation alone.
- Confirm GAWR from the vehicle certification label for every axle check.
Load Range vs Load Index
A practical explanation of load range and load index markings on commercial truck tires.
Single vs Dual Tire Load Rating
Why truck tires can have different single and dual load ratings and what to check on dual assemblies.
Axle Weight vs Tire Capacity
How to compare loaded axle weight with tire capacity using conservative example-only math.
Tire Ply Rating Explained
What ply rating means in modern truck tire language and why it is not a literal ply count.
GAWR vs Tire Load Capacity
Understand the difference between axle rating and tire capacity for commercial truck tire checks.