The maximum tyre load-carrying capacity corresponding to the service conditions specified by the tyre manufacturer shall be indicated by a load index per tyre for a single mounting. Load index is a numerical code which indicates a reference load used to define the load carrying capacity of the tyre.
Tyre identification consists of a load index (LI) (or two load indices in the case of single/dual fitments) and speed symbol (SS). Example: 91H or 121/119S