225/45R18 tire size
A 225/45R18 tire is 25.97 in (659.7 mm) tall and 8.86 in (225.0 mm) wide, and turns 777 revolutions per mile.
- 25.97 inOverall diameter
- 3.99 inSidewall height
- 777Revolutions per mile
- 26.0x8.9R18Flotation equivalent
| Measurement | Inches | Millimeters |
|---|---|---|
| Overall diameter | 25.97 in | 659.7 mm |
| Section width | 8.86 in | 225.0 mm |
| Sidewall height | 3.99 in | 101.3 mm |
| Rim diameter | 18.00 in | 457.2 mm |
| Circumference | 81.59 in | 2,073 mm |
| Revolutions per mile | 777 | |
| Flotation equivalent | 26.0x8.9R18 (approx.) | |
225/45R18 is a 18-inch tire with a 225 mm (8.86 in) section width and a 45% aspect ratio, giving a 3.99-inch sidewall and a flotation-style size of about 26.0x8.9R18.
Its overall diameter is 25.97 inches, so it rolls 81.6 inches per revolution and turns about 777 times per mile.
66 other sizes in this list are within 3% of that diameter.
Compare 225/45R18 with plausible swaps
- 225/55R16 vs 225/45R18 (−0.88%)
- 215/60R16 vs 225/45R18 (+0.71%)
- 225/50R17 vs 225/45R18 (−0.44%)
- 205/55R17 vs 225/45R18 (−0.36%)
- 255/45R17 vs 225/45R18 (+0.24%)
- 225/40R18 vs 225/45R18 (−3.41%)
- 215/45R18 vs 225/45R18 (−1.36%)
- 285/35R18 vs 225/45R18 (−0.45%)
- 225/45R18 vs 255/40R18 (+0.23%)
- 225/45R18 vs 295/35R18 (+0.61%)
- 225/45R18 vs 235/45R18 (+1.36%)
- 225/45R18 vs 245/45R18 (+2.73%)
- 225/45R18 vs 225/50R18 (+3.41%)
- 225/45R18 vs 285/30R19 (−0.92%)
- 225/45R18 vs 245/35R19 (−0.85%)
- 225/45R18 vs 295/30R19 (−0.02%)
- 225/45R18 vs 255/35R19 (+0.21%)
- 225/45R18 vs 225/40R19 (+0.44%)
- 225/45R18 vs 255/30R20 (+0.20%)
- 225/45R18 vs 225/35R20 (+0.88%)
Sizes within 3% of 25.97 in diameter
- 295/30R19 25.97 in (−0.02%)
- 215/65R15 26.00 in (+0.12%)
- 255/30R20 26.02 in (+0.20%)
- 255/35R19 26.03 in (+0.21%)
- 255/40R18 26.03 in (+0.23%)
- 255/45R17 26.04 in (+0.24%)
- 205/55R17 25.88 in (−0.36%)
- 225/40R19 26.09 in (+0.44%)
- 225/50R17 25.86 in (−0.44%)
- 285/35R18 25.85 in (−0.45%)
- 215/70R14 25.85 in (−0.47%)
- 235/60R15 26.10 in (+0.50%)
- 205/75R14 26.11 in (+0.52%)
- 295/35R18 26.13 in (+0.61%)
- 215/60R16 26.16 in (+0.71%)
- 245/35R19 25.75 in (−0.85%)
- 195/70R15 25.75 in (−0.86%)
- 225/35R20 26.20 in (+0.88%)
- 225/55R16 25.74 in (−0.88%)
- 305/30R19 26.20 in (+0.89%)
- 285/30R19 25.73 in (−0.92%)
- 245/40R18 25.72 in (−0.99%)
- 235/50R17 26.25 in (+1.08%)
- 265/30R20 26.26 in (+1.11%)
- 205/60R16 25.69 in (−1.11%)
- 245/45R17 25.68 in (−1.12%)
- 275/40R17 25.66 in (−1.20%)
- 205/70R15 26.30 in (+1.26%)
- 265/35R19 26.30 in (+1.27%)
- 215/55R17 26.31 in (+1.30%)
- 225/60R15 25.63 in (−1.32%)
- 215/45R18 25.62 in (−1.36%)
- 235/45R18 26.33 in (+1.36%)
- 265/40R18 26.35 in (+1.44%)
- 275/35R18 25.58 in (−1.52%)
- 225/70R14 26.40 in (+1.65%)
- 235/40R19 26.40 in (+1.65%)
- 195/75R14 25.52 in (−1.76%)
- 275/30R19 25.50 in (−1.83%)
- 205/65R15 25.49 in (−1.85%)
- 215/50R18 26.46 in (+1.89%)
- 235/35R19 25.48 in (−1.91%)
- 235/35R20 26.48 in (+1.94%)
- 215/50R17 25.46 in (−1.96%)
- 205/65R16 26.49 in (+2.00%)
- 275/30R20 26.50 in (+2.02%)
- 225/65R15 26.52 in (+2.09%)
- 235/40R18 25.40 in (−2.20%)
- 275/35R19 26.58 in (+2.33%)
- 265/40R17 25.35 in (−2.41%)
- 235/45R17 25.33 in (−2.49%)
- 225/60R16 26.63 in (+2.53%)
- 225/30R20 25.31 in (−2.53%)
- 215/55R16 25.31 in (−2.55%)
- 265/35R18 25.30 in (−2.58%)
- 245/50R17 26.65 in (+2.59%)
- 205/70R14 25.30 in (−2.59%)
- 275/40R18 26.66 in (+2.65%)
- 245/45R18 26.68 in (+2.73%)
- 265/30R19 25.26 in (−2.74%)
- 215/75R14 26.70 in (+2.79%)
- 245/40R19 26.72 in (+2.86%)
- 285/30R20 26.73 in (+2.93%)
- 195/60R16 25.21 in (−2.93%)
- 225/55R17 26.74 in (+2.97%)
- 225/35R19 25.20 in (−2.97%)
Open 225/45R18 in the tire size calculator
Source: Calculated from standard tire geometry formulas. Verified . How these numbers are calculated.