Michael Wilson
New Member
Being a motorcycle tech people often ask me what the numbers on tires mean. Here is my simple explination.
Take for example 120/60ZR17
120= the cross section (width) of the tire
60= proprtional height of the tire wall (percentage of the width)
Z= speed rating (149mph+)
R= radial type tire
17= inside of tire area (rim size)
There is also a 3 or 4 didget number that indentifys when the tire was made.
012: first week of 2002
2222: 22nd week of 2022
It is not recomended to run a tire that is more then 5 years old due to compisition break down.
*note always run a radial tire or street bike aplications with proper speed rating.
What I current run on my fz6r: Michelin road pilot 2
Front: 120/50ZR17
Rear: 190/50ZR17
Any questions?
Take for example 120/60ZR17
120= the cross section (width) of the tire
60= proprtional height of the tire wall (percentage of the width)
Z= speed rating (149mph+)
R= radial type tire
17= inside of tire area (rim size)
There is also a 3 or 4 didget number that indentifys when the tire was made.
012: first week of 2002
2222: 22nd week of 2022
It is not recomended to run a tire that is more then 5 years old due to compisition break down.
*note always run a radial tire or street bike aplications with proper speed rating.
What I current run on my fz6r: Michelin road pilot 2
Front: 120/50ZR17
Rear: 190/50ZR17
Any questions?
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