215/40R18 Tires

215/40R18 Conversion

When converted to inches, 215/40R18 is equivalent to 24.8x8.5R18.

215/40R18 tire has a section width of 8.5 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 3.4 inches (86 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 24.8 inches (629 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 77.9 inches (1975.1 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. 215/40R18 tire makes 813 revolutions per mile (506 revolutions per kilometer).

215/40R18 Section Width
8.5"
24.8"
215/40R18 Tire Side
Tire Circumference
77.9"
18"
3.4"
813 Revs/Mile
Metric Inches
Overall Diameter (Tire Height) 629 mm 24.8"
Tread Width 215 mm 8.5"
Rim Diameter 457.2 mm 18"
Sidewall Height 86 mm 3.4"
Circumference 1975.1 mm 77.9"
Revolutions 506 per km 813 per mile

215/40R18 Replacement Tire Sizes

Replacement tires have to be within 3% of the original tire's overall diameter. 215/40R18 tire can be replaced with 37 compatible tire sizes. Select optional plus size to see its specs.

Tire Size Overall Diameter Difference
255/30R18 24.1" (611 mm) -2.9%
225/35R18 24.2" (615 mm) -2.2%
175/45R18 24.2" (615 mm) -2.2%
265/30R18 24.3" (617 mm) -1.9%
135/60R18 24.4" (619 mm) -1.6%
225/30R19 24.4" (619 mm) -1.6%
235/35R18 24.4" (621 mm) -1.3%
205/40R18 24.4" (621 mm) -1.3%
235/30R19 24.6" (625 mm) -0.6%
245/35R18 24.8" (629 mm) 0%
285/30R18 24.8" (629 mm) 0%
245/30R19 24.8" (631 mm) 0.3%
295/25R19 24.8" (631 mm) 0.3%
215/35R19 24.9" (633 mm) 0.6%
125/70R18 24.9" (633 mm) 0.6%
295/30R18 25" (635 mm) 1%
255/35R18 25" (635 mm) 1%
305/25R19 25" (635 mm) 1%
255/30R19 25.1" (637 mm) 1.3%
225/40R18 25.1" (637 mm) 1.3%
215/30R20 25.1" (638 mm) 1.4%
305/30R18 25.2" (641 mm) 1.9%
205/45R18 25.2" (641 mm) 1.9%
315/25R19 25.2" (641 mm) 1.9%
225/35R19 25.2" (641 mm) 1.9%
265/30R19 25.3" (643 mm) 2.2%
155/60R18 25.3" (643 mm) 2.2%
265/35R18 25.3" (643 mm) 2.2%
225/30R20 25.4" (644 mm) 2.4%
235/40R18 25.4" (645 mm) 2.5%
115/70R19 25.4" (645 mm) 2.5%
145/65R18 25.4" (645 mm) 2.5%
135/60R19 25.4" (645 mm) 2.5%
275/25R20 25.4" (646 mm) 2.7%
235/35R19 25.5" (647 mm) 2.9%
135/70R18 25.5" (647 mm) 2.9%
315/30R18 25.5" (647 mm) 2.9%