What size tire is a 235 65R16?
R16 tires have a diameter of 28 (712 mm), a tread width of 9. The sidewall of the tire is 6 (153 mm), and the tire’s circumference is 87. This means a 235/65R16 tire will make make 721 revolutions per mile, or 447 revolutions per kilometer. Rim width should be between 75 to 90% of the tire section width, so for a 235 tire that would be a 7 to 8.