235/45 R18 tires diameter is 26.3 inches, section width is 9.3 inches and rim diameter is 18 inches. So the closest metric tire size of 235/45R18 existing size in inches is 35x11.50R18, which is 33.08% taller and 23.66% wider.
Compare 235/45 R18 vs 35x11.50R18 with our handy tire size calculator.
For each tire size there often there are several wheel sizes. You can't put very wide tires on narrow rims or vise versa. Here is what size of the rims do you need for 235/45 R18 tires:
Rim diameter x rim width
|235||The first number shows that the tire has a width of 235 millimeters or approximately 9.3 inches.|
|45||The second number is the aspect ratio. In this case, it is 45%. It shows the height of the tire from the ground to rim edge, which is 45% of the width or ~ 106mm|
|R18||The letter R means this tire is radial. Most of all tires nowadays are radial. The number is the tire diameter in inches. It means that tire will fit 18 inch wheels|