[ocliff4]

I READ THE ARTICLE ABOUT THE BAJA WINNER 450X
IT TALKED ABOUT A 130/90/18. ARE THESE TIRES
MEASURED LIKE CAR TIRES? I KNOW ON CAR TIRES
THE FIRST NUMBER IS TREAD WIDTH,SECOND NUMBER,
IS THE SIDEWALL HEIGHT,THIRD NUMBER,IS RIM SIZE
DOES THIS WORK THE SAME FOR BIKE TIRES???

[Smash]

Yup.

First number is section width. Second is aspect ratio and third is rim size.

120/90/18 breaks out like this...

120 = 120MM wide
90 = 90% aspect ratio = .90 X 120 = 108MM tall
18 = 18 inch rim.