By staff writer last updated mar 30 2020 1 43 28 pm et the letters sl on the sidewall of a truck tire indicate that the tire is a standard load tire that holds a maximum load pressure of 35 pounds per square inch.
What does sl load range mean on tires.
Light truck tires lt designate ranges in ascending alphabetical order with load range b representing a 4 ply rating at 35 psi.
They can carry the weight and withstand the weight pressure the load index designates on their sidewalls and they have no reinforcement in their internal structure.
Standard load sl or no branding also has a maximum load pressure of 35 psi.
Standard load tires have a maximum load pressure of 35 psi.
Check the tire sidewall to find the letter that indicates the load range.
Sl stands for standard load and xl indicates extra load.
Light truck tire load index light truck tires have two load indexes on the sidewall of the tire unlike passenger tires which only have one.
What does a load range of sl on a truck tire mean.
Tires on a sedan coupe crossover or minivan are usually unmarked because they have a standard 4 ply rating and do not require higher load carrying abilities.
The load range ply rating branded on a tire s sidewall identifies how much load the tire is designed to carry at its industry specified pressure passenger tires since most p metric passenger tires are manufactured in the standard load range they will have nothing branded on their sidewalls or may be branded standard load and identified by an sl in their descriptions as in p235 75r 15 sl.
Generally speaking the higher the tire load index the more weight the tire can safely carry.
If you take a look at the markings on your tires you will be able to tell that your set is in the standard load range if they have either no letters or an sl on their sidewalls sequence of letters and numbers.
For example if a tire has a load index of 92 it can support 1 389 pounds at maximum air pressure.
An sl rated tire has its maximum load capacity at an inflation pressure of 35 psi.
Extra load xl has a maximum load pressure of 41 psi.
Most passenger car tire load indexes range from 75 to 100 but some are higher.
The tire load index lets you know the load carrying capacity of a tire.
In other words it s the amount of weight your tire can support safely.
However you may find these tires marked as standard load sl or extra load xl or reinforced.
Xl tires can carry a heavier load when inflated to 41 psi.
C representing a 6 ply rating at 50 psi and so on.
When you multiply that amount for a single tire by four your vehicle s maximum load capacity would be 4 940 pounds.
Special trailer service tires.
As you can see the further down the alphabet you go the strong the tire will be.
A tire with the load capacity determined to be essential for its tire size designated by the load index is an sl or standard load tire.