How many inches are 275 65 18 tires?

Answer 1

To convert the tire size 275/65R18 into inches, you can break it down: the first number (275) represents the width of the tire in millimeters, the second number (65) is the aspect ratio (the height of the sidewall as a percentage of the width), and the last number (18) is the diameter of the wheel in inches. The sidewall height can be calculated as 65% of 275 mm, which is approximately 178.75 mm, or about 7.03 inches. Adding the sidewall height twice (for both sides) to the wheel diameter gives you the overall diameter of the tire, which is approximately 31.03 inches.