Load/Speed Index

Speed Rating

A tire receives its speed rating by Independent testing institutes through meeting minimum standards for reaching and sustaining a specified speed. What does that mean to you? Well, in general, a higher speed rating will result in better car handling.


Two important notes when considering speed rating:


• We do not recommend downgrading the speed rating of your tires. This may result in poor handling and unpredictable steering. However, if you want better cornering response, there is no problem installing a higher speed rated tire on your vehicle.


• Never mix and match tires with different speed ratings on your vehicle. This will cause serious problems with the handling of your vehicle.

Below is a list of speed ratings along with the corresponding speeds they represent. Remember, the speeds are test speeds, not recommended speeds.

Speed Rating Mile/Hour Kilometers/Hour  Speed Rating Miles/Hour Kilometers/Hour
N 87 140  U 124 200
P 93 150  H 130 210
Q 99 160  V 149 240
R 106 170  Z 150+ 240+
S 112 180  W 168 270
T 118 190  Y 186 300

Load Index

The load index is a numerical code associated with the maximum load a tyre can carry (see load index table) at the speed indicated by its speed symbol.

                                             L/I                       KG                   L/I                      KG

                                            72                         355                      90                       600 
                                            73                         365                      91                       615
                                            74                         375                      92                       630
                                            75                         387                      93                       650
                                            76                         400                     94                       670
                                            77                         412                      95                        690
                                            78                         425                      96                        710
                                           79                          437                      97                        730
                                           80                          450                     98                        750 
                                           81                          462                      99                        775
                                           82                          475                     100                      800
                                           83                          487                     101                      825
                                           84                          500                     102                      850 
                                           85                          515                      103                      875
                                           86                          530                     104                      900
                                           87                          545                     105                       925
                                           88                          560                     106                      950
                                           89                          580                     107                      975

All the above suggest that a tyre with load/speed rating of 91V can sustain the load of 615kg for a certain period of time at the maximum speed of 240 Km/Hr.