Metric Tire Size Conversion Inch Equivalent 255 / 85 R 16 = 33 x 10.0-16 = 33 x 10.0 - 16 285 / 75 R 16 = 33 x 11.2-16 = 33 x 11.0 - 16 285 / 70 R 17 = 33 x 11.2-17 = 33 x 11.0 - 17 305 / 70 R 16 = 33 x 12.0-16 = 33 x 12.0 - 16 305 / 65 R...