ISO LOAD INDEX - SPEED RATINGS

UNDERSTANDING LOAD & SPEED RATINGS

 

Tyre performance is marked by ISO LOAD INDEX (LI) and SPEED SYMBOL (SI). LI refers to the maximum load that one tyre can support, and SI refers to the maximum speed that a tyre can handle. Exceeding the legal speed limit is neither recommended nor endorsed.

 

ISO LOAD INDEX

 

The ISO LOAD INDEX is a numerical code associated with the maximum load a tyre can carry at the speed indicated by its SPEED SYMBOL under service conditions specified by the tyre manufacturer. (1 kg = 2.205 lbs.)

 

load index table

load; index, loadindex;

 

SPEED SYMBOL

 

The ISO SPEED SYMBOL indicates the maximum speed at which the tyre can carry a load corresponding to its Load Index under service conditions specified by the tyre manufacturer.

speed index table

speed index table; speed index truck; table truck speed