215/45R18 in Inches

Tire size 215/45R18 refers to the tire size in numbers and letters such as the first number “215” indicates the tire width in millimeters, the second number “45” indicates the aspect ratio of the tire and the last number indicates the diameter of the tire. A 215/45R18 tire in inches can be described as a tire with a width of about 8.5 inches, a sidewall height of about 3.8 inches, and it fits on a 18-inch wheel.

Converting 215/45R18 in Inches

215/45R18 inches mm
Tire Diameter 25.6 inches 651 mm
Tread Width 8.5 inches 215 mm
Rim Diameter 18 inches 457 mm
Sidewall Height 3.8 inches 97 mm
Circumference 80.4 inches 2044 mm
Revolutions 788 per mile 489 per km

Tire Size Calculator

The Tire Size Calculator is a convenient online tool that helps determine the correct tire dimensions for a vehicle, ensuring optimal performance and compatibility.

Tire Diameter
Tread Width
Rim Diameter
Sidewall Height
Circumference
Revolutions

215/45R18 Alternate Tire Size

Tire Size Overall Diameter Difference
125/70R18 24.9″ (633 mm) -2.8%
215/35R19 24.9″ (633 mm) -2.8%
255/35R18 25″ (635 mm) -2.5%
305/25R19 25″ (635 mm) -2.5%
295/30R18 25″ (635 mm) -2.5%
255/30R19 25.1″ (637 mm) -2.2%
225/40R18 25.1″ (637 mm) -2.2%
215/30R20 25.1″ (638 mm) -2%
315/25R19 25.2″ (641 mm) -1.5%
205/45R18 25.2″ (641 mm) -1.5%
305/30R18 25.2″ (641 mm) -1.5%
225/35R19 25.2″ (641 mm) -1.5%
155/60R18 25.3″ (643 mm) -1.2%
265/30R19 25.3″ (643 mm) -1.2%
265/35R18 25.3″ (643 mm) -1.2%
225/30R20 25.4″ (644 mm) -1.1%
135/60R19 25.4″ (645 mm) -0.9%
115/70R19 25.4″ (645 mm) -0.9%
145/65R18 25.4″ (645 mm) -0.9%
235/40R18 25.4″ (645 mm) -0.9%
275/25R20 25.4″ (646 mm) -0.8%
135/70R18 25.5″ (647 mm) -0.6%
235/35R19 25.5″ (647 mm) -0.6%
315/30R18 25.5″ (647 mm) -0.6%
275/30R19 25.6″ (649 mm) -0.3%
275/35R18 25.6″ (649 mm) -0.3%
285/25R20 25.6″ (650 mm) -0.2%
235/30R20 25.6″ (650 mm) -0.2%
335/25R19 25.6″ (651 mm) 0%
245/40R18 25.7″ (653 mm) 0.3%
245/35R19 25.8″ (655 mm) 0.6%
215/40R19 25.8″ (655 mm) 0.6%
285/30R19 25.8″ (655 mm) 0.6%
245/30R20 25.8″ (656 mm) 0.8%
295/25R20 25.8″ (656 mm) 0.8%
285/35R18 25.9″ (657 mm) 0.9%
225/45R18 25.9″ (659 mm) 1.2%
125/70R19 25.9″ (659 mm) 1.2%
335/30R18 25.9″ (659 mm) 1.2%
305/25R20 26″ (660 mm) 1.4%
295/30R19 26″ (661 mm) 1.5%
355/25R19 26″ (661 mm) 1.5%
145/70R18 26″ (661 mm) 1.5%
185/55R18 26″ (661 mm) 1.5%
255/35R19 26″ (661 mm) 1.5%
255/40R18 26″ (661 mm) 1.5%
255/30R20 26.1″ (662 mm) 1.7%
295/35R18 26.1″ (663 mm) 1.8%
225/40R19 26.1″ (663 mm) 1.8%
205/50R18 26.1″ (663 mm) 1.8%
345/30R18 26.2″ (665 mm) 2.2%
315/25R20 26.2″ (666 mm) 2.3%
225/35R20 26.2″ (666 mm) 2.3%
305/30R19 26.3″ (667 mm) 2.5%
265/30R20 26.3″ (668 mm) 2.6%
235/45R18 26.3″ (669 mm) 2.8%
265/35R19 26.3″ (669 mm) 2.8%
265/40R18 26.3″ (669 mm) 2.8%
325/25R20 26.4″ (670 mm) 2.9%

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