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MC Tire Designations

Street Tire Size Designations

Street Tire Size Designations / Inch Designations / Alphabetical Designations

Motorcycle Street Tire Size

Front

Metric Alphabetical Inch
80/90 MH90 2.50/2.75
90/90 MJ90 2.75/3.00
100/90 MM90 3.25/3.50
110/90 MM90 3.75/4.00
120/80 - 4.25/4.50
120/90 MR90 4.25/4.50
130/90 MT90 5.00/5.10

Rear

Metric Alphabetical Inch
110/90 MN90 3.75/4.25
120/80 MP85 4.50/4.75
120/90 MP85 4.50/4.75
130/80 - 5.00/5.10
130/90 MT90 5.00/5.10
140/80 - 5.50/6.00
140/90 MU90 5.50/6.00
150/80 MV85 6.00/6.25
150/90 MB85 6.00/6.25

Pry Rating and LI⁄SS Conversion

Pry Rating LI/SS
2.75-10 2Pry 2.75-10 26J
2.75-10 4Pry 2.75-10 38J
3.00-10 2Pry 3.00-10 32J
3.00-10 4Pry 3.00-10 42J
3.50-10 2Pry 3.50-10 41J
3.50-10 4Pry 3.50-10 51J
Pry Rating LI/SS
2.75-14 4Pry 2.75-14 35P
2.75-14 6Pry 2.75-14 41P
2.25-17 4Pry 2.25-17 33L
2.50-17 4Pry 2.50-17 38L
2.50-17 6Pry 2.50-17 43L

Load Rating (Load Index:LI)

Load Index

LI KGS LBS
21 82.5 182
22 85 187
23 87.5 193
24 90 198
25 92.5 204
26 95 209
27 97.5 215
28 100 220
29 103 227
30 106 234
31 109 240
32 112 247
33 115 254
34 118 260
35 121 267
36 125 276
37 128 282
38 132 291
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
LI KGS LBS
51 195 430
52 200 441
53 206 454
54 212 467
55 218 481
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
65 290 639
66 300 661
67 307 677
68 315 694
69 325 716
70 335 736
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

Speed Rating (Speed Symbol:SS) for Motorcycle use

Speed Symbol

SS Km/h Mph
F 80 50
J 100 62
L 120 75
M 130 81
N 140 87
P 150 94
R 170 106
S 180 112
H 210 130
V 240 149
Z 240+ 149+
W 270 168
(W) 270+ 168+