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TECHNICAL INFORMATION CONVERSION CHART FOR STREET TIRES
Street tire size designation
Metric designation
130 / 90 - 16 67 H
Speed Rating
Load Rating
Rim Diameter (inches)
Aspect Ratio (90%)
Section Width (mm)
Inch designation
5.00 H 16 4PR
Casing Strength(ply rating)
Rim Diameter
Speed Rating
Section Width (inches)
Alphabetical designation
M T 90 -16 Load Range B
Load Range
Rim Diameter (inches)
Aspect Ratio (90%)
Tire Width Code
Motorcycle code
Speed rating chart
Tire Dimensions
Width
offroad
Metric Alpha Inches Rim
Maximum Design/
Test Speed
Type MPH KM/H
B 31 50
C 37 60
D 40 65
E 43 69
F 50 80
G 56 90
J 62 100
K 68 110
L 75 120
M 81 130
N 87 140
P 94 150
Q 99 160
R 106 170
S 112 180
T 118 190
U 124 200
H 130 210
V 149 240
(V) or Z >149 240+
Z 149+ 240+
W 168 270
(W) >168 270+
Y 186 305
Z or (V) >149 240+
Motorcycle
Use
Tires with 2.00, 2.25 & 2.50 nominal section
widths are rated for 75 mph.
width
Load index rating chart
Load Rating - a numerical code which corresponds
to the total carrying capacity at the speed indicated
by the speed symbol.
Aspect Ratio = Section Height
Section Width
x 100
Tire Inflation
Always keep the motorcycle manufacturer’s recommended air pressure in both tires. This is an important
requirement for tire safety and mileage. Your motorcycle owner’s manual will tell you the recommended cold
inflation pressure. On some motorcycles, the recommended front and rear tire pressures will be different.
The pressures stamped on the sidewall of the tire are only for maximum loads. On some occasions, these
pressures will also be the manufacturers recommended settings as well.
Riding on tires with too little air pressure is dangerous. The tires will build excessive heat. This can cause a
sudden tire failure that could lead to serious personal injury or death.
Under inflation may also:
1. Damage the tire leading to tire failure
2. Adversely affect vehicle cornering
3. Reduce tire life
4. Increase fuel consumption
5. Fatigue cracking
Typically at the end of a tire description
you’ll find the letters “TT” or “TL”.
• TT = Tube Type
• (BW = Black Wall Tire)
• TL = Tubeless
• (WW = White Wall Tire)
Dimensional equivalencies
and conversions
All types of diagonal
achitecture tires
Metric Alpha Inches Rim
width
50/100 2.00
120/80 MR90 4.25-4.50-4.60 4.25/4.85
60/100 2.25
120/90 MS90 4.25-4.50 5.10
70/100 MG90 2.5
130/80 4.50-4.60-5.10
80/80 MH90 2.75 3.60
130/90 MT90 4.50-4.60-5.10 5.10
80/90 MJ90 2.75-3.00 3.60
140/80 4.50-5.10-5.50
90/90 ML90 3.00-3.25-3.60 4.10
140/90 MU90 5.10-5.50
100/90 MM90 3.50-4.00 4.10
150/90 MV90 6.00
110/80 MN90 4.00-4.10-4.60 4.60
160/90 6.25
110/90 MP90 4.25 4.25/4.85
The width of street tires is measured at the level of the base of the thread blocks. The
width of offroad tires is measured at the level of the widest point at the top of the thread
blocks.
How to read a motorcycle tire sidewall
Diameter of wheel in inches.
Load range symbol maximum load
and corresponding inflation pressure.
U.S. Dot safety
standard serial
identification code.
First two digits indicate week of
year tire was manufactured.
After 01/100, the number of date code digits
increases from 3 to 4, and the last two digits
indicate decade & year tire was manufactured.
Front wheel fitment instruction
Tire ply and
composition materials
used.
Before 01/100, last digit indicates year
tire was manufactured.
Tubeless designation
size expression
Width of tire
in millimeters
Ration of height to width
(Aspect ratio)
Load index and
speed symbol
Index LBS Kilo
20 176 80
21 182 83
22 187 85
23 193 87
24 198 89
25 204 92
26 209 95
27 215 97
28 220 99
29 227 103
30 234 106
31 240 109
32 247 112
33 254 115
34 260 118
35 267 121
36 276 125
37 282 128
38 291 132
39 300 136
40 309 140
41 320 145
42 331 150
43 342 155
44 353 160
45 364 165
46 375 170
Index LBS Kilo
47 386 175
48 397 180
49 408 185
50 419 190
51 430 195
52 441 200
53 454 206
54 467 212
55 481 218
56 494 224
57 507 230
58 520 236
59 536 243
60 551 250
61 567 257
62 584 265
63 600 272
64 617 280
65 639 290
66 661 300
67 677 307
68 694 314
69 717 325
70 739 335
71 761 345
72 783 355
73 805 365
Index LBS Kilo
74 827 375
75 853 387
76 882 400
77 908 412
78 937 425
79 963 437
80 992 450
81 1019 462
82 1047 475
83 1074 487
84 1102 500
85 1135 515
86 1168 530
87 1202 545
88 1235 560
89 1279 580
90 1323 600
91 1356 615
92 1389 630
93 1433 650
94 1477 670
95 1521 690
96 1565 710
97 1609 730
98 1653 750
99 1709 775
Rim width
Height
Width Street