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Speed Rating
Load Index and Speed Rating
The load index is an assigned number ranging from 0 to 279 that corresponds
with the maximum load carrying capacity of a tyre. Most passenger
car tyre load indexes range from 62 to 126.
The speed index is an assigned letter ranging from J to Z that corresponds
to the reference maximum speed at the associated load index. Refer
passenger speed rating section below.
These two elements put together are called the Service Description
and are mutually dependent.
The table below gives the load index and the speed symbol with their
corresponding values.
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| 62 |
265 |
75 |
387 |
88 |
560 |
101 |
825 |
114 |
1180 |
J |
100 |
| 63 |
272 |
76 |
400 |
89 |
580 |
102 |
850 |
115 |
1215 |
K |
110 |
| 64 |
280 |
77 |
412 |
90 |
600 |
103 |
875 |
116 |
1250 |
L |
120 |
| 65 |
290 |
78 |
425 |
91 |
615 |
104 |
900 |
117 |
1285 |
M |
130 |
| 66 |
300 |
79 |
437 |
92 |
630 |
105 |
925 |
118 |
1320 |
N |
140 |
| 67 |
307 |
80 |
450 |
93 |
650 |
106 |
950 |
119 |
1360 |
P |
150 |
| 68 |
315 |
81 |
462 |
94 |
670 |
107 |
975 |
120 |
1400 |
Q |
160 |
| 69 |
325 |
82 |
475 |
95 |
690 |
108 |
1000 |
121 |
1450 |
R |
170 |
| 70 |
335 |
83 |
487 |
96 |
710 |
109 |
1030 |
122 |
1500 |
S |
180 |
| 71 |
345 |
84 |
500 |
97 |
730 |
110 |
1060 |
123 |
1550 |
T |
190 |
| 72 |
355 |
85 |
515 |
98 |
750 |
111 |
1090 |
124 |
1600 |
H |
210 |
| 73 |
365 |
86 |
530 |
99 |
775 |
112 |
1120 |
125 |
1650 |
V |
240 |
| 74 |
375 |
87 |
545 |
100 |
800 |
113 |
1150 |
126 |
1700 |
W |
270 |
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Y |
300 |
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VR |
>210 |
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ZR |
>240 |
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