Load Index & Speed Rating Charts

This code, when present, appears after the size marking. The code comprises three characters, two numbers and a letter, e.g. 67 H, known as a service description. The two-digit number is a code for the maximum load carrying capacity of the tire. The letter is a maximum speed rating indicating the maximum speed at which the tire may be used with maximum load when the maximum listed inflation pressure is used. Shinko Does not recommend or endorse exceeding the safe, legal speed limit. The load index/speed symbol indicates the speed at which the tire can carry a load corresponding to its load index under conditions specified by the tire manufacturer.

Load Index

Index KG. LBS.
30 106 234
31 109 240
32 112 245
33 115 254
34 118 260
35 121 267
36 125 276
37 128 282
38 128 282
39 136 300
40 140 309
41 145 320
42 150 331
43 155 342
44 160 353
45 165 364
46 170 375
47 175 386
48 180 397
49 185 408
50 190 419
51 195 430
52 200 441
53 206 454
55 218 490
54 212 467
56 224 494
57 230 507
58 236 520
59 243 536
60 250 551
61 257 567
62 265 584
63 272 600
64 280 617
65 290 640
66 300 661
67 307 677
68 315 695
69 325 717
70 335 738
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

Speed Rating

Code km/h mph
R 170 106
S 180 112
H 210 130
V 239+ 149+
Z 240+ 149+
W 270 168

Tire Conversion Charts

Size Conversion Tables: Use these tables to convert your older style inch size to the new metric sizing.

Metric Alpha Inch
Front Street Tires
80/90 MH90 2.50/2.75
90/90 MJ90 2.75/3.00
100/80 MJ90 3.00
100/90 MM90 3.25/3.50
110/70 * *
110/80 * 3.25/3.50
120/80 * *
120/70 * *
120/80 * 3.75/4.25/4.60
120/90 MR90 4.25/4.50
130/60 * *
130/70 * *
130/90 MT90 5.00/5.10
Metric Alpha Inch
Rear Street Tires
110/90 MN90 3.75/4.25
120/80 MP85 4.50/4.75
120/90 MP85 4.50/4.75
130/70 * *
130/80 * 5.00/5.10
130/90 MT90 5.00/5.10
140/60 * *
140/70 * *
140/80 * 5.50/6.00
140/90 MU90 5.50/6.00
150/70 * *
150/80 MU85 6.00/6.25
150/90 MU85 6.00/6.25
160/60 * *
160/70 * *
160/80 * *
170/60 * *
170/80 * *
180/50 * *
180/55 * *