275/65R18 in Inches: Overall Diameter = 32.07 Inches (32 1/8″)
Quick Answer Box 275/65R18 tire size converted to inches: What is 275/65R18 in Inches? 275/65R18 is a tire size code, and its overall diameter equals 32.07 inches (about 32 1/8″). The “275” is the tread width in millimeters (metric), the “65” is the aspect ratio (a percentage, not a unit), and “18” is the rim…