225/55R18 tire size
A 225/55R18 tire is 27.74 in (704.7 mm) tall and 8.86 in (225.0 mm) wide, and turns 727 revolutions per mile.
- 27.74 inOverall diameter
- 4.87 inSidewall height
- 727Revolutions per mile
- 27.7x8.9R18Flotation equivalent
| Measurement | Inches | Millimeters |
|---|---|---|
| Overall diameter | 27.74 in | 704.7 mm |
| Section width | 8.86 in | 225.0 mm |
| Sidewall height | 4.87 in | 123.8 mm |
| Rim diameter | 18.00 in | 457.2 mm |
| Circumference | 87.16 in | 2,214 mm |
| Revolutions per mile | 727 | |
| Flotation equivalent | 27.7x8.9R18 (approx.) | |
225/55R18 is a 18-inch tire with a 225 mm (8.86 in) section width and a 55% aspect ratio, giving a 4.87-inch sidewall and a flotation-style size of about 27.7x8.9R18.
Its overall diameter is 27.74 inches, so it rolls 87.2 inches per revolution and turns about 727 times per mile.
73 other sizes in this list are within 3% of that diameter.
Compare 225/55R18 with plausible swaps
- 225/65R16 vs 225/55R18 (−0.82%)
- 245/60R16 vs 225/55R18 (−0.61%)
- 215/70R16 vs 225/55R18 (+0.38%)
- 235/65R16 vs 225/55R18 (+1.02%)
- 205/75R16 vs 225/55R18 (+1.31%)
- 245/55R17 vs 225/55R18 (−0.48%)
- 225/60R17 vs 225/55R18 (−0.41%)
- 215/65R17 vs 225/55R18 (+0.94%)
- 225/50R18 vs 225/55R18 (−3.19%)
- 215/55R18 vs 225/55R18 (−1.56%)
- 245/50R18 vs 225/55R18 (−0.35%)
- 225/55R18 vs 275/45R18 (0.00%)
- 225/55R18 vs 235/55R18 (+1.56%)
- 225/55R18 vs 245/55R18 (+3.12%)
- 225/55R18 vs 225/60R18 (+3.19%)
- 225/55R18 vs 275/40R19 (−0.30%)
- 225/55R18 vs 245/45R19 (−0.23%)
- 225/55R18 vs 225/50R19 (+0.41%)
- 225/55R18 vs 285/40R19 (+0.84%)
- 225/55R18 vs 275/35R20 (−0.60%)
- 225/55R18 vs 245/40R20 (−0.10%)
- 225/55R18 vs 285/35R20 (+0.40%)
Sizes within 3% of 27.74 in diameter
- 275/45R18 27.74 in (0.00%)
- 245/35R21 27.75 in (+0.03%)
- 245/40R20 27.72 in (−0.10%)
- 245/30R22 27.79 in (+0.16%)
- 215/75R15 27.70 in (−0.17%)
- 295/25R22 27.81 in (+0.23%)
- 245/45R19 27.68 in (−0.23%)
- 275/40R19 27.66 in (−0.30%)
- 245/50R18 27.65 in (−0.35%)
- 215/70R16 27.85 in (+0.38%)
- 285/35R20 27.85 in (+0.40%)
- 225/50R19 27.86 in (+0.41%)
- 225/60R17 27.63 in (−0.41%)
- 245/55R17 27.61 in (−0.48%)
- 275/35R20 27.58 in (−0.60%)
- 245/60R16 27.57 in (−0.61%)
- 235/70R15 27.95 in (+0.75%)
- 295/30R21 27.97 in (+0.81%)
- 225/65R16 27.52 in (−0.82%)
- 285/40R19 27.98 in (+0.84%)
- 275/30R21 27.50 in (−0.89%)
- 215/65R17 28.00 in (+0.94%)
- 255/30R22 28.02 in (+1.01%)
- 235/65R16 28.03 in (+1.02%)
- 255/35R21 28.03 in (+1.02%)
- 255/40R20 28.03 in (+1.04%)
- 255/45R19 28.04 in (+1.05%)
- 255/50R18 28.04 in (+1.06%)
- 305/35R19 27.41 in (−1.22%)
- 225/70R15 27.40 in (−1.23%)
- 265/45R18 27.39 in (−1.28%)
- 285/45R18 28.10 in (+1.28%)
- 235/60R17 28.10 in (+1.29%)
- 205/75R16 28.11 in (+1.31%)
- 295/35R20 28.13 in (+1.39%)
- 265/40R19 27.35 in (−1.43%)
- 235/45R19 27.33 in (−1.50%)
- 215/55R18 27.31 in (−1.56%)
- 235/55R18 28.18 in (+1.56%)
- 265/35R20 27.30 in (−1.59%)
- 295/40R18 27.29 in (−1.63%)
- 225/75R14 27.29 in (−1.65%)
- 305/30R21 28.20 in (+1.66%)
- 235/50R18 27.25 in (−1.77%)
- 235/50R19 28.25 in (+1.83%)
- 265/30R22 28.26 in (+1.86%)
- 225/75R15 28.29 in (+1.96%)
- 295/40R19 28.29 in (+1.97%)
- 265/35R21 28.30 in (+2.02%)
- 235/55R17 27.18 in (−2.04%)
- 235/45R20 28.33 in (+2.10%)
- 215/60R17 27.16 in (−2.11%)
- 265/40R20 28.35 in (+2.17%)
- 295/35R19 27.13 in (−2.21%)
- 205/75R15 27.11 in (−2.30%)
- 235/60R16 27.10 in (−2.31%)
- 265/45R19 28.39 in (+2.33%)
- 225/70R16 28.40 in (+2.37%)
- 225/40R20 27.09 in (−2.37%)
- 265/50R18 28.43 in (+2.48%)
- 255/50R17 27.04 in (−2.54%)
- 255/45R18 27.04 in (−2.55%)
- 255/40R19 27.03 in (−2.57%)
- 255/35R20 27.03 in (−2.58%)
- 215/65R16 27.00 in (−2.67%)
- 27x8.50R14 27.00 in (−2.68%)
- 275/30R22 28.50 in (+2.71%)
- 285/40R18 26.98 in (−2.77%)
- 225/65R17 28.52 in (+2.78%)
- 225/45R19 26.97 in (−2.78%)
- 295/30R20 26.97 in (−2.80%)
- 245/65R16 28.54 in (+2.87%)
- 245/60R17 28.57 in (+2.99%)
Open 225/55R18 in the tire size calculator
Source: Calculated from standard tire geometry formulas. Verified . How these numbers are calculated.