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HOME DUNLOP TYRE FALKEN TIRE SUMITOMO TIRE OFFICE INFORMATION
TIRE KNOWLEDGE NOTES

 
  3-4 3-4) Service descriptions
 
(1) Load Index (LI) table

The ISO* LOAD INDEX is a numerical code associated with the maximum load a tire can carry at the speed indicated by its SPEED SYMBOL under service conditions specified by the tire manufacturer. (lbs values are just conversed from kg,1 kg = 2.205 lbs.)
  

LI
 kg lbs
60
250
551
61
257
567
62
265
584
63
272
600
64
280
617
65
290
639
66
300
661
67
307
677
68
315
694
69
325
716
70
335
739
71
345
761
72
355
783
73
365
805
74
375
827
75
387
853
76
400
882
77
412
908
78
425
937
79
437
963
80
450
992
81
462
1019
82
475
1047
83
487
1074
84
500
1102
85
515
1135
86
530
1168
87
545
1201
88
560
1235
89
580
1279
90
600
1323
91
615
1356

LI
 kg lbs
92
630
1389
93
650
1433
94
670
1477
95
690
1521
96
710
1565
97
730
1609
98
750
1653
99
775
1709
100
800
1764
101
825
1819
102
850
1874
103
875
1929
104
900
1984
105
925
2039
106
950
2094
107
975
2149
108
1,000
2205
109
1,030
2271
110
1,060
2337
111
1,090
2403
112
1,120
2469
113
1,150
2535
114
1,180
2601
115
1,215
2679
116
1,250
2756
117
1,285
2833
118
1,320
2910
119
1,360
2998
120
1,400
3086
121
1,450
3197
122
1,500
3307
123
1,550
3417

LI
 kg lbs
124
1,600
3527
125
1,650
3638
126
1,700
3748
127
1,750
3858
128
1,800
3968
129
1,850
4078
130
1,900
4189
131
1,950
4299
132
2,000
4409
133
2,060
4541
134
2,120
4674
135
2,180
4806
136
2,240
4938
137
2,300
5071
138
2,360
5203
139
2,430
5357
140
2,500
5511
141
2,575
5677
142
2,650
5842
143
2,725
6007
144
2,800
6173
145
2,900
6393
146
3,000
6614
147
3,075
6779
148
3,150
6944
149
3,250
7165
150
3,350
7385
151
3,450
7606
152
3,550
7826
153
3,650
8047
154
3,750
8267
155
3,875
8543

LI
 kg lbs
156
4,000
8818
157
4,125
9094
158
4,250
9369
159
4,375
9645
160
4,500
9921
161
4,625
10196
162
4,750
10472
163
4,875
10747
164
5,000
11023
165
5,150
11354
166
5,300
11684
167
5,450
12015
168
5,600
12346
169
5,800
12787
170
6,000
13228
171
6,150
13558
172
6,300
13889
173
6,500
14330
174
6,700
14771
175
6,900
15212
176
7,100
15653
177
7,300
16093
178
7,500
16534
179
7,750
17086
180
8,000
17637
181
8,250
18188
182
8,500
18739
183
8,750
19290
184
9,000
19841
185
9,250
20392
186
9,500
20944
187
9,750
21495
  * International Standardization Organization  
 
  (2) Speed symbol (SS) table

The ISO SPEED SYMBOL indicates the speed at which the tire can carry a load corresponding to its LOAD INDEX under service conditions specified by the tire manufacturer.		  

SS
Speed
kph
mph
A1
5
3
A2
10
6
A3
15
9
A4
20
12
A5
25
16
A6
30
19
A7
35
22
A8
40
25

SS
Speed
kph
mph
B
50
31
C
60
37
D
65
40
E
70
43
F
80
50
G
90
56
J
100
62
K
110
68

SS
Speed
kph
mph
L
120
74
M
130
81
N
140
87
P
150
93
Q
160
99
R
170
105
S
180
112
T
190
118

SS
Speed
kph
mph
U
200
124
H
210
130
V
240
149
W
270
167
Y
300
186
     
     
     
  * Values in kph and mph rounded to the nearest practical unit.  
 
  (3) Speed category (SC) marking

  

SC
Max. Speed (kph)
ZR
Above 240
 
  (4) Unit

  

Quantity
S.I. Units
Other Units
Length
m
(meter)
1 inch (") = 25.4 mm
1 mile = 1.609 km
1 km = 0.621 mile
Mass
kg
(kilogram)
1 pound (lb) = 0.4536 kg
1 kg = 2.205 lbs.
Pressure
kPa
(kilopascal)
1 bar* = 100 kPa
1 psi = 6.895 kPa
(pound per square inch)
1 kg/cm2 = 98.066 kPa
Speed
m / s
(meter per second)
1 kph = 0.27778 m / s
(kilometer per hour)
1 mph = 0.4470 m / s
(mile per hour)
= 1.60935 kph
  * Non S.I. unit to be retained for use in specialized fields.  
 
  (5) Pressure unit conversion table

 

kPa
bar
psi*
kg / cm2*
100
1.0
15
1.0
150
1.5
22
1.5
200
2.0
29
2.0
250
2.5
36

2.5
300
3.0
44
3.1
350
3.5
51
3.6
400
4.0
58
4.1
450
4.5
65

4.6
500
5.0
73
5.1
550
5.5
80
5.6
600
6.0
87
6.1
650
6.5
94

6.6
700
7.0
102
7.1
750
7.5
109
7.7
800
8.0
116
8.2
850
8.5
123

8.7
900
9.0
131
9.2
950
9.5
138
9.7
1000
10.0
145
10.2
1050
10.5
152

10.7
  * Values in psi and kg/cm2 rounded to the nearest practical unit.  

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