315/70R18 Tires

315/70R18 Conversion

When converted to inches, 315/70R18 is equivalent to 35.4x12.4R18.

315/70R18 tire has a section width of 12.4 inches which is the measurement of tire's width from its inner sidewall to its outer sidewall. Rim diameter of 18 inches represents the size of the wheel the tire can be mounted on. Sidewall height of 8.7 inches (221 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 35.4 inches (899 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 111.2 inches (2822.9 mm) is the outer perimeter of the tire. Tire revolutions indicate the number of times a tire revolves while it covers the distance in miles or kilometers. 315/70R18 tire makes 570 revolutions per mile (354 revolutions per kilometer).

315/70R18 Section Width
12.4"
35.4"
315/70R18 Tire Side
Tire Circumference
111.2"
18"
8.7"
570 Revs/Mile
Metric Inches
Overall Diameter (Tire Height) 899 mm 35.4"
Tread Width 315 mm 12.4"
Rim Diameter 457.2 mm 18"
Sidewall Height 221 mm 8.7"
Circumference 2822.9 mm 111.2"
Revolutions 354 per km 570 per mile

315/70R18 Replacement Tire Sizes

Replacement tires have to be within 3% of the original tire's overall diameter. 315/70R18 tire can be replaced with 14 compatible tire sizes. Select optional plus size to see its specs.

Tire Size Overall Diameter Difference
305/60R20 34.4" (874 mm) -2.8%
335/55R20 34.5" (876 mm) -2.6%
285/65R20 34.6" (878 mm) -2.3%
325/65R18 34.6" (879 mm) -2.2%
285/75R18 34.8" (885 mm) -1.6%
305/70R18 34.8" (885 mm) -1.6%
315/60R20 34.9" (886 mm) -1.4%
295/65R20 35.1" (892 mm) -0.8%
275/80R18 35.3" (897 mm) -0.2%
325/60R20 35.4" (898 mm) -0.1%
375/60R18 35.7" (907 mm) 0.9%
305/75R18 36" (915 mm) 1.8%
355/65R18 36.2" (919 mm) 2.2%
375/55R20 36.2" (920 mm) 2.3%