305/65R18 in Inches

Tire size 305/65R18 refers to the tire size in numbers and letters such as the first number “305” indicates the tire width in millimeters, the second number “65” indicates the aspect ratio of the tire and the last number indicates the diameter of the tire. A 305/65R18 tire in inches can be described as a tire with a width of about 12 inches, a sidewall height of about 7.8 inches, and it fits on a 18-inch wheel.

Converting 305/65R18 in Inches

305/65R18 inches mm
Tire Diameter 33.6 inches 853 mm
Tread Width 12 inches 305 mm
Rim Diameter 18 inches 457 mm
Sidewall Height 7.8 inches 198 mm
Circumference 105.5 inches 2678 mm
Revolutions 601 per mile 373 per km

Tire Size Calculator

The Tire Size Calculator is a convenient online tool that helps determine the correct tire dimensions for a vehicle, ensuring optimal performance and compatibility.

Tire Diameter
Tread Width
Rim Diameter
Sidewall Height
Circumference
Revolutions

305/65R18 Alternate Tire Size

Tire Size Overall Diameter Difference
265/70R18 32.6″ (829 mm) -2.8%
295/55R20 32.8″ (832 mm) -2.5%
375/50R18 32.8″ (833 mm) -2.3%
325/50R20 32.8″ (834 mm) -2.2%
275/60R20 33″ (838 mm) -1.8%
245/70R19.5 33″ (839 mm) -1.6%
295/65R18 33.1″ (841 mm) -1.4%
275/70R18 33.2″ (843 mm) -1.2%
305/55R20 33.2″ (844 mm) -1.1%
375/45R20 33.3″ (846 mm) -0.8%
325/60R18 33.3″ (847 mm) -0.7%
285/60R20 33.5″ (850 mm) -0.4%
285/70R18 33.7″ (857 mm) 0.5%
295/60R20 33.9″ (862 mm) 1.1%
355/50R20 34″ (864 mm) 1.3%
275/65R20 34.1″ (866 mm) 1.5%
295/70R18 34.3″ (871 mm) 2.1%
345/60R18 34.3″ (871 mm) 2.1%
305/60R20 34.4″ (874 mm) 2.5%
335/55R20 34.5″ (876 mm) 2.7%
285/65R20 34.6″ (878 mm) 2.9%

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