Both have a 4 ply rating but the extra load can support additional load at up to 42 psi while the standard load is 36 psi.
Tire load range xl vs sl.
Going back to the audi example the car s service information is.
An sl rated tire has its maximum load capacity at an inflation pressure of 35 psi.
The tire load index rating communicates how many pounds a tire can safely carry.
What is tire load index.
The primary difference between sl and xl tires of the same size is that a higher pressure can be used with an xl tire which in turn increases the tire s load capacity.
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.
Sl stands for standard load and xl indicates extra load.
Standard load sl or no branding also has a maximum load pressure of 35 psi extra load xl has a maximum load pressure of 41 psi light truck tires lt designate ranges in ascending alphabetical order with load range b representing a 4 ply rating at 35 psi.
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.
Your tires are in the extra load or reinforced range if they include either an xl or an rf in their descriptions.
Extra load p metric tires will be branded extra load and identified by an xl in their descriptions as in p235 75r 15 xl.
Referring to the tire load rating index chart below the number 94 translates to a load carrying capacity of 1477 pounds per tire.
However you may find these tires marked as standard load sl or extra load xl or reinforced.
Tire load range vs.
Tire load ranges inflation pressure assigned for maximum load ratings p metric light load ll 35 psi standard load sl 35 psi extra load xl 41 psi light truck load range.
94 indicates the load index.
Listed below are the air pressures at which maximum load is rated for popular p metric and lt tires.
The higher load capacity is due to the tire s special design as the tire is capable of withstanding a higher air pressure which is directly related to its maximum load.
Xl tires can carry a heavier load when inflated to 41 psi.