225/45R18 Tires

225/45R18 Conversion

When converted to inches, 225/45R18 is equivalent to 25.9x8.9R18.

225/45R18 tire has a section width of 8.9 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 4 inches (101 mm) is the measurement from the wheel rim to top of the tire tread. Overall diameter of 25.9 inches (659 mm) reflects the outer diameter of the tire and stands for tire height. Circumference of 81.3 inches (2069.3 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. 225/45R18 tire makes 779 revolutions per mile (483 revolutions per kilometer).

225/45R18 Section Width
8.9"
25.9"
225/45R18 Tire Side
Tire Circumference
81.3"
18"
4"
779 Revs/Mile
Metric Inches
Overall Diameter (Tire Height) 659 mm 25.9"
Tread Width 225 mm 8.9"
Rim Diameter 457.2 mm 18"
Sidewall Height 101 mm 4"
Circumference 2069.3 mm 81.3"
Revolutions 483 per km 779 per mile
Best Prices on 225/45R18 Tires
Amazon
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TireRack from $107.32
Discount Tire from $97.70
Priority Tire from $79.93
Simple Tire from $91.96

225/45R18 Replacement Tire Sizes

Replacement tires have to be within 3% of the original tire's overall diameter. 225/45R18 tire can be replaced with 65 compatible tire sizes. Select optional plus size to see its specs.

Tire Size Overall Diameter Difference
225/35R19 25.2" (641 mm) -2.7%
205/45R18 25.2" (641 mm) -2.7%
305/30R18 25.2" (641 mm) -2.7%
315/25R19 25.2" (641 mm) -2.7%
155/60R18 25.3" (643 mm) -2.4%
265/35R18 25.3" (643 mm) -2.4%
265/30R19 25.3" (643 mm) -2.4%
225/30R20 25.4" (644 mm) -2.3%
115/70R19 25.4" (645 mm) -2.1%
235/40R18 25.4" (645 mm) -2.1%
135/60R19 25.4" (645 mm) -2.1%
145/65R18 25.4" (645 mm) -2.1%
275/25R20 25.4" (646 mm) -2%
235/35R19 25.5" (647 mm) -1.8%
315/30R18 25.5" (647 mm) -1.8%
135/70R18 25.5" (647 mm) -1.8%
275/30R19 25.6" (649 mm) -1.5%
275/35R18 25.6" (649 mm) -1.5%
285/25R20 25.6" (650 mm) -1.4%
235/30R20 25.6" (650 mm) -1.4%
335/25R19 25.6" (651 mm) -1.2%
215/45R18 25.6" (651 mm) -1.2%
245/40R18 25.7" (653 mm) -0.9%
285/30R19 25.8" (655 mm) -0.6%
215/40R19 25.8" (655 mm) -0.6%
245/35R19 25.8" (655 mm) -0.6%
245/30R20 25.8" (656 mm) -0.5%
295/25R20 25.8" (656 mm) -0.5%
285/35R18 25.9" (657 mm) -0.3%
335/30R18 25.9" (659 mm) 0%
125/70R19 25.9" (659 mm) 0%
305/25R20 26" (660 mm) 0.2%
355/25R19 26" (661 mm) 0.3%
295/30R19 26" (661 mm) 0.3%
145/70R18 26" (661 mm) 0.3%
255/35R19 26" (661 mm) 0.3%
185/55R18 26" (661 mm) 0.3%
255/40R18 26" (661 mm) 0.3%
255/30R20 26.1" (662 mm) 0.5%
205/50R18 26.1" (663 mm) 0.6%
295/35R18 26.1" (663 mm) 0.6%
225/40R19 26.1" (663 mm) 0.6%
345/30R18 26.2" (665 mm) 0.9%
315/25R20 26.2" (666 mm) 1.1%
225/35R20 26.2" (666 mm) 1.1%
305/30R19 26.3" (667 mm) 1.2%
265/30R20 26.3" (668 mm) 1.4%
235/45R18 26.3" (669 mm) 1.5%
265/35R19 26.3" (669 mm) 1.5%
265/40R18 26.3" (669 mm) 1.5%
325/25R20 26.4" (670 mm) 1.7%
235/40R19 26.4" (671 mm) 1.8%
305/35R18 26.4" (671 mm) 1.8%
235/35R20 26.5" (672 mm) 2%
135/80R18 26.5" (673 mm) 2.1%
315/30R19 26.5" (673 mm) 2.1%
135/70R19 26.5" (673 mm) 2.1%
215/50R18 26.5" (673 mm) 2.1%
275/30R20 26.5" (674 mm) 2.3%
155/70R18 26.6" (675 mm) 2.4%
275/35R19 26.6" (675 mm) 2.4%
335/25R20 26.6" (676 mm) 2.6%
315/35R18 26.7" (677 mm) 2.7%
245/45R18 26.7" (677 mm) 2.7%
275/40R18 26.7" (677 mm) 2.7%