Depends on the wheel width... but +18 is probably your best bet if you're in the 8-9" wide range?
Printable View
Depends on the wheel width... but +18 is probably your best bet if you're in the 8-9" wide range?
yeah they are 9". what about 33x12.50x18
..... stick with a 285/65/18
285 = width (basically the tire width) in millimeters. 285 millimeters wide.
65 = sidewall height as a percentage of the width. So 65% in this case. 65% of 285mm = 185mm.
18 = wheel diameter.
You can figure out the overall tire diameter by just adding the wheel diameter and 2 times the sidewall (So 18" + 185x2mm = 32.56").
A QUICK way to determine tire diameter is this:
(First Number) x (Second Number) / 1270 + (Third Number)
So: 285 x 65 / 1270 + 18 = 32.58"
To determine tire width, just convert mm to inches by dividing by 25.4:
285/25.4 = 11.22
QED:
285/65/18 = 32.5x11.2x18