Cycle Shop USA carries a variety of high performance motorcycle tires. Our motorcycle tires come from such manufactures as AVON, BRIDGESTONE, CHENG SHIN, DUNLOP, FIRESTONE, IRC, KENDA, and MAXXIS.
ASPECT RATIO
The aspect ratio of a motorcycle tire is the relationship of the motorcycle tire cross section height to the cross section width. In a motorcycle tire with an aspect ratio of 85, for example, height is about 85% of the motorcycle tire width. Low profile motorcycle tires have an aspect ratio of less than 80. The aspect ration of a motorcycle tire is often contained in the size marking, e.g., 130/90 x 16, etc.
SPEED RATING (SUSTAINED SPEED)
R = 106 mph
S = 112 mph
T = 118 mph
H = 130 mph
V = 150 mph
W = 168 mph
Z = 150 + (Contact Manufacturer)
MOTORCYCLE TIRE SIZE MARKINGS
Motorcycle tires are manufactured in a number of different countries with differing requirements in terms of load, dimensions and speed ratings. This has resulted in various size markings. The following chart gives a guide to the relationship between various size markings.
THIS CHART DOES NOT IMPLY EXACT COMPARISONS.
STREET MOTORCYCLE TIRE SIZE CONVERSION CHART
FRONT MOTORCYCLE TIRES
REAR MOTORCYCLE 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
4.25/4.50
120/90
MR90
4.25/4.50
130/90
MT90
5.00/5.10
Metric
Alpha
Inch
110/90
MP85
4.00/4.25
120/90
MR90
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
MY85
6.00/6.25
150/90
MY85
6.00/6.25
KNOBBY MOTORCYCLE TIRE SIZE CONVERSION CHART
FRONT MOTORCYCLE TIRES
REAR MOTORCYCLE 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
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
WARNING: The above are size marking conversion charts only and do not imply interchangeability. Consult motorcycle manufacturer for correct replacements for original equipment motorcycle tires. Critical clearances, motorcycle compatibility and stability, load bearing capacity, speed rating, radial versus non-radial, pattern and tread compound requirements, inflation recommendations, and front to rear matching will all vary with motorcycle tire selection. Wrong selection can result in motorcycle tire failure, loss of control with serious injury or death.
