215/40R18 Tire Size in Inches

215/40R18 is a metric tire size representation, which defines that the tires have a width of 215 mm, 40 is the aspect ratio and a rim diameter of 18 inches. In the imperial system the tire size 215/40R18 equates to a 24.8×8.5R18 that is commonly used in the automotive industry. So Converting 215/40R18 in inches the tires have a length of 24.8 inches, a width of 8.5 inches, a sidewall height of 3.4 inches and The number of complete resolutions made by the corresponding tire size is equal to 813 per mile with a circumference of 77.9 inches.

215/40R18 tire size in inches

215/40R18inchesmm
Tire Diameter24.8 inches629 mm
Tread Width8.5 inches215 mm
Rim Diameter18 inches457 mm
Sidewall Height3.4 inches86 mm
Circumference77.9 inches1975 mm
Revolutions813 per mile506 per km

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215/40R18 Equivalent Tire Sizes for replacement

If you are replacing your tires, always keep in mind that they are compatible with your vehicle so that the impact on the overall performance of your vehicle can be reduced. Here we have listed some tire size that is equivalent to 215/40R18 tires.

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%

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