The TIRE LOAD INDEX is a numerical value assigned to a tire in relation to the its load bearing capability. The greater the load index number, the higher the load-bearing capability of the tire will be.

Load IndexLoad (lbs)Load (kg)Load IndexLoad (lbs)Load (kg)Load IndexLoad (lbs)Load (kg)
7073933591135661511224691120
7176134592138963011325351150
7278335593143365011426021180
7380536594147767011526791215
7482737595152169011627561250
7585338796156571011728331285
7688240097160973011829101320
7790841298165375011929981360
7893742599170977512030861400
79963437100176480012131971450
80992450101181982512222071500
811019462102187485012334171550
821047475103192987512435271600
831074487104198490012536381650
841102500105203992512637481700
851135515106209495012738581750
861168530107214997512839681800
8712015451082205100012940791850
8812355601092271103013041891900
8912795801102337106013142991950
9013236001112403109013244092000 

SPEED INDEX, also called speed rating of a tire, is the rating it has been designed to run at and still provide performance characteristics. This is often matched to the vehicle’s speed and performance as well as the load-bearing capability based on its load index. Please note that Milestar does not recommend the use of any tire above the legal speed limit of the road the vehicle is operating on.

Speed SymbolMPHKPH
L75120
M81130
N87140
P93150
Q99160
R106170
S112180
T118190
U124200
H130210
V149240
W168270
Y186300
Z*149+240+ 

*Any tire having a maximum speed capability of greater than 149MPH may be at the tire manufacturers description assigned a Z in the tire size designation such as 245/40ZR18