STARCO Blue Catalogue INT en 2015 | Page 160
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TECHNICAL SPECIFICATIONS
Technical specifications
LOAD CAPACITY
PR marking
Originally tyres were marked with the exact number of canvas layers (plies) built into the tyre. This was an indication of the strength of the
tyre.
As stronger materials were developed, the number of layers could be reduced – maintaining the same strength of the tyre.
The designation “Ply Rating” therefore does not indicate the actual number of layers (plies) in the tyre, but the number of layers originally
required to give the desired load capacity.
When working with PR marked tyres, the actual
manufacturers data must be used to determine
the load capacity in kg (or pounds).
SPEED INDEX
Load Index / Speed Index
LI = Load Index
SI = Speed Index
Load Index and Speed Index will gradually
replace the PR marking.
Contrary to the PR marking, the LI and SI give
unambiguous and comparable information on
the load capacity – independent of manufacture
and dimension – as the codes can be directly
converted to actual values.
The tables give an overview of relevant LI and SI
codes.
SI
km/h
mph
SI
km/h
mph
SI
km/h
mph
A1
5
3
D
65
41
Q
160
100
A2
10
6
E
70
44
R
170
106
A3
15
9
F
80
50
S
180
113
A4
20
13
G
90
56
T
190
118
A5
25
16
J
100
63
U
200
124
A6
30
19
K
110
69
H
210
130
A7
35
22
L
120
75
V
240
150
A8
40
25
M
130
81
W
270
176
Y
300
189
B
50
31
N
140
88
C
60
38
P
150
94
LOAD INDEX
LI
kg (lb)
LI
kg (lb)
LI
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
45 (99)
46,2 (102)
47,5 (105)
48,7 (107)
50 (110)
51,5 (113)
53 (117)
54,5 (120)
56 (123)
58 (128)
60 (132)
61,5 (135)
63 (139)
65 (143)
67 (147)
69 (152)
71 (156)
73 (161)
75 (165)
77,5 (171)
80 (176)
82,5 (182)
85 (187)
87,5 (193)
90 (198)
92,5 (204)
95 (209)
97,5 (215)
100 (220)
103 (227)
106 (233)
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
109 (240)
112 (246)
115 (253)
118 (260)
121 (266)
125 (275)
128 (282)
132 (290)
136 (299)
140 (308)
145 (319)
150 (330)
155 (341)
160 (352)
165 (363)
170 (374)
175 (385)
180 (396)
185 (407)
190 (418)
195 (429)
200 (440)
206 (453)
212 (466)
218 (480)
224 (493)
230 (506)
236 (519)
243 (535)
250 (550)
257 (565)
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
160
kg (lb)
265 (583)
272 (598)
280 (616)
290 (638)
300 (660)
307 (675)
315 (693)
325 (715)
335 (737)
345 (759)
355 (781)
365 (803)
375 (825)
387 (851)
400 (880)
412 (906)
425 (935)
437 (961)
450 (990)
462 (1016)
475 (1045)
487 (1071)
500 (1100)
515 (1133)
530 (1166)
545 (1199)
560 (1232)
580 (1276)
600 (1320)
615 (1353)
630 (1386)
LI
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
kg (lb)
650 (1430)
670 (1474)
690 (1518)
710 (1562)
730 (1606)
750 (1650)
775 (1705)
800 (1760)
825 (1815)
850 (1870)
875 (1925)
900 (1980)
925 (2035)
950 (2090)
975 (2145)
1000 (2200)
1030 (2266)
1060 (2332)
1090 (2398)
1120 (2464)
1150 (2530)
1180 (2596)
1215 (2662)
1250 (2750)
1285 (2816)
1320 (2904)
1360 (2992)
1400 (3080)
1450 (3190)
1500 (3300)
1550 (3410)
starco.com
LI
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
kg (lb)
1600 (3520)
1650 (3630)
1700 (3740)
1750 (3850)
1800 (