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Xxsuperheroxx > Wrenching in the Pits > Tire Sizes What Do They Mean


Title: Tire Sizes What Do They Mean
Description: convertion chart


XXSUPERHEROXX - June 12, 2006 05:04 PM (GMT)
Tire size what do the numbers really mean for dirt bike nobbys.

Size Types

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Motorcycle Off-Road Tire Size Conversion Chart

Front Tires
Metric.....Alpha.....Inch
60/100....90/80....2.50/2.75
70/100....90/90....2.75/3.00
80/100...100/80...3.00/3.25

Rear Tires
Metric..........Alpha..........Inch
80/100.........80/90.......2.50/3.60
90/100........110/90......3.60/4.10
100/100......120/80.......4.00/4.10
110/100......130/80.......4.00/4.50
120/100......140/80.......5.00/5.10

Motorcycle Street Tire Size Conversion Chart

Front Tires
Metric....Alpha....Inch
80/90....MH......2.50/2.75
90/90....MJ90....2.75/3.00
100/90..MM90....3.25/3.50
110/90..MN90....3.75/4.00
120/80..N/A.......4.25/4.50
120/90..MR90....4.25/4.50
130/90..MT90....5.00/5.10

Rear Tires
Metric....Alpha......Inch
110/90..MP85....4.50/4.75
120/90..MR90....4.50/4.75
130/80..N/A.......5.00/5.10
130/90..MT90.....5.00/5.10
140/80..N/A.......5.50/6.00
140/90..MU90.....5.50/6.00
150/80..MV85.....6.00/6.25
150/90..MV85.....6.00/6.25


Motorcycle Speed Ratings

Speed Symbol....Max Speed
J.......................62 mph
K.......................68 mph
L.......................75 mph
M.......................81 mph
N.......................87 mph
P.......................93 mph
Q.......................99 mph
R.......................106 mph
S.......................112 mph
T.......................118 mph
U.......................124 mph
H.......................130 mph
V.......................149 mph
W.......................168 mph
Y.......................186 mph




Load Indexes (L.I.)
L.I. lbs.
33- 254
34- 260
36- 276
37- 282
38- 291
39- 300
40- 309
41- 320
42- 331
43- 342
44- 353
45- 364
46- 375
47- 386
48- 397
49- 408
50- 419
52- 441
53- 454
54- 467
55- 481
56- 494
57- 507
58- 520
59- 536
60- 551
61- 567
62- 584
63- 600
64- 617
65- 639
66- 661
68- 694
69- 716
70- 739
71- 761
72- 783
73- 805
74- 827
75- 853
76- 882
77- 908
78- 937
79- 963
80- 992




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