235 width of tread in millimeters
75= height of sidewall as a percentage of tread width
235 X 75% = 176.25 height of sidewall
R= radial
15 is diameter of wheel in inches
Hello
It depends what numbers/letters you have as some include Max load rating and Max speed rating.
See link below
Andy C
You'll see something like 235/75R15
235 is the second width
75 is the aspect ratio (height)
and R15 is rim diameter 15" wheel
If you had asked that of the google machine, multiple sites would've popped up explaining it.
metric, its width/percent of width for sidewall height/rim size. standard is height/width/rim
