Can’t understand what those numbers mean? Not
sure how to convert metric to alpha or inches to metric? Were here to
help!!! These simple conversion charts should offer some insight and help to
understanding tire designations.
Motorcycle Street Tire Size Conversions
Front
Tires
Rear
Tires
metric
alpha
inch
metric
alpha
inch
80/90
MH90
2.50/2.75
110/90
MP85
4.00/4.25
90/90
MJ90
2.75/3.00
120/90
MR90
4.50/4.75
100/90
MM90
3.25/3.50
130/90
MT90
5.00/5.10
110/90
MN90
3.75/4.00
140/90
MU90
5.50/6.00
120/90
MR90
4.25/4.50
150/80
MV85
6.00/6.25
130/90
MT90
5.00/5.10
150/90
MV85
6.00/6.25
Motorcycle
Knobby Tire Size
Front
Rear
Metric
Old Metric
Inch
60/ 100
90/
80
2.50/ 2.75
70/ 100
90/
90
2.75/ 3.00
80/ 100
100/
80
3.25/ 3.50
Metric
Old Metric
Inch
80/ 100
80/
90
2.50/ 3.60
90/ 100
110/
80
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 Tire Tire Code Designations
STREET TIRE
SIZE DESIGNATION
METRIC
DESIGNATION
INCH
DESIGNATION
ALPHABETICAL DESIGNATION
Motorcycle Tire Speed Ratings and Load Ratings
Speed Rating
Chart
Motorcycle
Speed Ratings
Maximum
Design/Test Speed
J Type
62
100
N Type
87
140
P Type
94
150
S Type
112
180
H Type
130
210
V Type
149
240
Z Type
149+
240+
Tires with
2.00, 2.25 & 2.50 nominal section widths are rated for
75 mph.
