Tire Load and Speed Index

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 Index	Load (lbs)	Load (kg)		Load Index	Load (lbs)	Load (kg)		Load Index	Load (lbs)	Load (kg)
70	739	335		91	1356	615		112	2469	1120
71	761	345		92	1389	630		113	2535	1150
72	783	355		93	1433	650		114	2602	1180
73	805	365		94	1477	670		115	2679	1215
74	827	375		95	1521	690		116	2756	1250
75	853	387		96	1565	710		117	2833	1285
76	882	400		97	1609	730		118	2910	1320
77	908	412		98	1653	750		119	2998	1360
78	937	425		99	1709	775		120	3086	1400
79	963	437		100	1764	800		121	3197	1450
80	992	450		101	1819	825		122	2207	1500
81	1019	462		102	1874	850		123	3417	1550
82	1047	475		103	1929	875		124	3527	1600
83	1074	487		104	1984	900		125	3638	1650
84	1102	500		105	2039	925		126	3748	1700
85	1135	515		106	2094	950		127	3858	1750
86	1168	530		107	2149	975		128	3968	1800
87	1201	545		108	2205	1000		129	4079	1850
88	1235	560		109	2271	1030		130	4189	1900
89	1279	580		110	2337	1060		131	4299	1950
90	1323	600		111	2403	1090		132	4409	2000

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 Symbol	MPH	KPH
L	75	120
M	81	130
N	87	140
P	93	150
Q	99	160
R	106	170
S	112	180
T	118	190
U	124	200
H	130	210
V	149	240
W	168	270
Y	186	300
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