285/40R18 Tires

285/40R18 Conversion

When converted to inches, 285/40R18 is equivalent to 27x11.2R18.

285/40R18 tire has a section width of 11.2 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 4.5 inches (114 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 27 inches (685 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 84.8 inches (2150.9 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. 285/40R18 tire makes 747 revolutions per mile (465 revolutions per kilometer).

285/40R18 Section Width
11.2"
27"
285/40R18 Tire Side
Tire Circumference
84.8"
18"
4.5"
747 Revs/Mile
Metric Inches
Overall Diameter (Tire Height) 685 mm 27"
Tread Width 285 mm 11.2"
Rim Diameter 457.2 mm 18"
Sidewall Height 114 mm 4.5"
Circumference 2150.9 mm 84.8"
Revolutions 465 per km 747 per mile
Best Prices on 285/40R18 Tires
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TireRack from $313.00
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285/40R18 Replacement Tire Sizes

Replacement tires have to be within 3% of the original tire's overall diameter. 285/40R18 tire can be replaced with 77 compatible tire sizes. Select optional plus size to see its specs.

Tire Size Overall Diameter Difference
345/30R18 26.2" (665 mm) -2.9%
315/25R20 26.2" (666 mm) -2.8%
225/35R20 26.2" (666 mm) -2.8%
305/30R19 26.3" (667 mm) -2.6%
265/30R20 26.3" (668 mm) -2.5%
265/40R18 26.3" (669 mm) -2.3%
265/35R19 26.3" (669 mm) -2.3%
235/45R18 26.3" (669 mm) -2.3%
325/25R20 26.4" (670 mm) -2.2%
305/35R18 26.4" (671 mm) -2%
235/40R19 26.4" (671 mm) -2%
235/35R20 26.5" (672 mm) -1.9%
315/30R19 26.5" (673 mm) -1.8%
215/50R18 26.5" (673 mm) -1.8%
135/80R18 26.5" (673 mm) -1.8%
135/70R19 26.5" (673 mm) -1.8%
275/30R20 26.5" (674 mm) -1.6%
275/35R19 26.6" (675 mm) -1.5%
155/70R18 26.6" (675 mm) -1.5%
335/25R20 26.6" (676 mm) -1.3%
245/45R18 26.7" (677 mm) -1.2%
275/40R18 26.7" (677 mm) -1.2%
315/35R18 26.7" (677 mm) -1.2%
325/30R19 26.7" (679 mm) -0.9%
245/40R19 26.7" (679 mm) -0.9%
345/25R20 26.8" (680 mm) -0.7%
245/35R20 26.8" (680 mm) -0.7%
285/30R20 26.8" (680 mm) -0.7%
145/60R20 26.9" (682 mm) -0.4%
285/35R19 26.9" (683 mm) -0.3%
205/55R18 26.9" (683 mm) -0.3%
225/50R18 26.9" (683 mm) -0.3%
325/35R18 27" (685 mm) 0%
225/45R19 27" (685 mm) 0%
335/30R19 27" (685 mm) 0%
255/35R20 27" (686 mm) 0.1%
295/30R20 27" (686 mm) 0.1%
255/45R18 27" (687 mm) 0.3%
255/40R19 27" (687 mm) 0.3%
225/40R20 27.1" (688 mm) 0.4%
295/35R19 27.1" (689 mm) 0.6%
165/70R18 27.1" (689 mm) 0.6%
145/80R18 27.1" (689 mm) 0.6%
345/30R19 27.2" (691 mm) 0.9%
305/30R20 27.2" (692 mm) 1%
295/40R18 27.3" (693 mm) 1.2%
215/55R18 27.3" (693 mm) 1.2%
175/60R19 27.3" (693 mm) 1.2%
235/50R18 27.3" (693 mm) 1.2%
265/35R20 27.3" (694 mm) 1.3%
155/60R20 27.3" (694 mm) 1.3%
265/40R19 27.4" (695 mm) 1.5%
265/45R18 27.4" (695 mm) 1.5%
235/45R19 27.4" (695 mm) 1.5%
145/65R20 27.4" (696 mm) 1.6%
235/40R20 27.4" (696 mm) 1.6%
305/35R19 27.4" (697 mm) 1.8%
355/30R19 27.4" (697 mm) 1.8%
315/30R20 27.5" (698 mm) 1.9%
345/35R18 27.5" (699 mm) 2%
175/55R20 27.6" (700 mm) 2.2%
275/35R20 27.6" (700 mm) 2.2%
305/40R18 27.6" (701 mm) 2.3%
155/70R19 27.6" (701 mm) 2.3%
215/45R20 27.6" (702 mm) 2.5%
145/85R18 27.7" (703 mm) 2.6%
315/35R19 27.7" (703 mm) 2.6%
205/60R18 27.7" (703 mm) 2.6%
245/50R18 27.7" (703 mm) 2.6%
275/40R19 27.7" (703 mm) 2.6%
245/45R19 27.7" (703 mm) 2.6%
325/30R20 27.7" (704 mm) 2.8%
195/50R20 27.7" (704 mm) 2.8%
245/40R20 27.7" (704 mm) 2.8%
275/45R18 27.8" (705 mm) 2.9%
225/55R18 27.8" (705 mm) 2.9%
155/80R18 27.8" (705 mm) 2.9%