175/80R18 Tires

175/80R18 Conversion

When converted to inches, 175/80R18 is equivalent to 29x6.9R18.

175/80R18 tire has a section width of 6.9 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 5.5 inches (140 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 29 inches (737 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 91.1 inches (2314.2 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. 175/80R18 tire makes 695 revolutions per mile (432 revolutions per kilometer).

175/80R18 Section Width
6.9"
29"
175/80R18 Tire Side
Tire Circumference
91.1"
18"
5.5"
695 Revs/Mile
Metric Inches
Overall Diameter (Tire Height) 737 mm 29"
Tread Width 175 mm 6.9"
Rim Diameter 457.2 mm 18"
Sidewall Height 140 mm 5.5"
Circumference 2314.2 mm 91.1"
Revolutions 432 per km 695 per mile

175/80R18 Replacement Tire Sizes

Replacement tires have to be within 3% of the original tire's overall diameter. 175/80R18 tire can be replaced with 52 compatible tire sizes. Select optional plus size to see its specs.

Tire Size Overall Diameter Difference
145/80R19 28.1" (715 mm) -3%
235/55R18 28.1" (715 mm) -3%
345/30R20 28.2" (716 mm) -2.8%
295/40R19 28.3" (719 mm) -2.4%
235/50R19 28.3" (719 mm) -2.4%
265/40R20 28.3" (720 mm) -2.3%
235/45R20 28.3" (720 mm) -2.3%
155/85R18 28.4" (721 mm) -2.2%
265/45R19 28.4" (721 mm) -2.2%
305/35R20 28.4" (722 mm) -2%
295/45R18 28.5" (723 mm) -1.9%
265/50R18 28.5" (723 mm) -1.9%
345/35R19 28.5" (725 mm) -1.6%
245/55R18 28.6" (727 mm) -1.4%
225/60R18 28.6" (727 mm) -1.4%
315/35R20 28.7" (728 mm) -1.2%
245/45R20 28.7" (728 mm) -1.2%
275/40R20 28.7" (728 mm) -1.2%
245/50R19 28.7" (729 mm) -1.1%
155/80R19 28.8" (731 mm) -0.8%
305/45R18 28.8" (731 mm) -0.8%
275/45R19 28.8" (731 mm) -0.8%
225/55R19 28.8" (731 mm) -0.8%
275/50R18 28.9" (733 mm) -0.5%
315/40R19 28.9" (735 mm) -0.3%
325/35R20 29" (736 mm) -0.1%
285/40R20 29" (736 mm) -0.1%
255/55R18 29" (737 mm) 0%
155/90R18 29" (737 mm) 0%
255/45R20 29.1" (738 mm) 0.1%
235/60R18 29.1" (739 mm) 0.3%
285/45R19 29.1" (739 mm) 0.3%
255/50R19 29.1" (739 mm) 0.3%
145/80R20 29.1" (740 mm) 0.4%
235/55R19 29.2" (741 mm) 0.5%
285/50R18 29.3" (743 mm) 0.8%
235/50R20 29.3" (744 mm) 0.9%
295/40R20 29.3" (744 mm) 0.9%
265/45R20 29.4" (746 mm) 1.2%
225/65R18 29.5" (749 mm) 1.6%
325/45R18 29.5" (749 mm) 1.6%
295/45R19 29.5" (749 mm) 1.6%
265/50R19 29.5" (749 mm) 1.6%
265/55R18 29.5" (749 mm) 1.6%
245/60R18 29.6" (751 mm) 1.9%
305/40R20 29.6" (752 mm) 2%
245/55R19 29.6" (753 mm) 2.2%
245/50R20 29.7" (754 mm) 2.3%
165/90R18 29.7" (755 mm) 2.4%
275/45R20 29.8" (756 mm) 2.6%
275/55R18 29.9" (759 mm) 3%
275/50R19 29.9" (759 mm) 3%