285/55r20 in inches

Quick Answer Box What is 285/55R20 in Inches? 285/55R20 equals 32.34 inches in total tire diameter. This is a metric tire size code used worldwide, but American drivers often need the imperial (inch) measurement to compare tires, check wheel well clearance, or match a spare tire. The code mixes metric (285mm width, 55% aspect ratio)…