255/65R18 tire size
A 255/65R18 tire is 31.05 in (788.7 mm) tall and 10.04 in (255.0 mm) wide, and turns 650 revolutions per mile.
- 31.05 inOverall diameter
- 6.53 inSidewall height
- 650Revolutions per mile
- 31.1x10.0R18Flotation equivalent
| Measurement | Inches | Millimeters |
|---|---|---|
| Overall diameter | 31.05 in | 788.7 mm |
| Section width | 10.04 in | 255.0 mm |
| Sidewall height | 6.53 in | 165.8 mm |
| Rim diameter | 18.00 in | 457.2 mm |
| Circumference | 97.55 in | 2,478 mm |
| Revolutions per mile | 650 | |
| Flotation equivalent | 31.1x10.0R18 (approx.) | |
255/65R18 is a 18-inch tire with a 255 mm (10.04 in) section width and a 65% aspect ratio, giving a 6.53-inch sidewall and a flotation-style size of about 31.1x10.0R18.
Its overall diameter is 31.05 inches, so it rolls 97.6 inches per revolution and turns about 650 times per mile.
54 other sizes in this list are within 3% of that diameter.
Compare 255/65R18 with plausible swaps
- 265/70R16 vs 255/65R18 (−1.43%)
- 31x10.50R16 vs 255/65R18 (−0.16%)
- 235/75R17 vs 255/65R18 (−0.56%)
- 255/70R17 vs 255/65R18 (+0.01%)
- 275/65R17 vs 255/65R18 (+0.08%)
- 245/75R17 vs 255/65R18 (+1.34%)
- 285/65R17 vs 255/65R18 (+1.72%)
- 235/65R18 vs 255/65R18 (−3.30%)
- 255/60R18 vs 255/65R18 (−3.23%)
- 245/65R18 vs 255/65R18 (−1.65%)
- 275/60R18 vs 255/65R18 (−0.19%)
- 255/65R18 vs 285/60R18 (+1.33%)
- 255/65R18 vs 265/65R18 (+1.65%)
- 255/65R18 vs 255/70R18 (+3.23%)
- 255/65R18 vs 275/65R18 (+3.30%)
- 255/65R18 vs 275/55R19 (−0.46%)
- 255/65R18 vs 235/65R19 (−0.08%)
- 255/65R18 vs 255/60R19 (−0.01%)
- 255/65R18 vs 305/45R20 (−0.79%)
- 255/65R18 vs 275/50R20 (−0.72%)
- 255/65R18 vs 255/55R20 (−0.03%)
- 255/65R18 vs 285/50R20 (+0.55%)
- 255/65R18 vs 265/55R20 (+1.37%)
Sizes within 3% of 31.05 in diameter
- 255/70R17 31.06 in (+0.01%)
- 255/60R19 31.05 in (−0.01%)
- 255/55R20 31.04 in (−0.03%)
- 255/50R21 31.04 in (−0.04%)
- 275/65R17 31.07 in (+0.08%)
- 235/65R19 31.03 in (−0.08%)
- 285/45R21 31.10 in (+0.15%)
- 31x10.50R15 31.00 in (−0.16%)
- 31x10.50R16 31.00 in (−0.16%)
- 275/60R18 30.99 in (−0.19%)
- 285/40R22 30.98 in (−0.24%)
- 275/55R19 30.91 in (−0.46%)
- 305/30R24 31.20 in (+0.49%)
- 285/50R20 31.22 in (+0.55%)
- 235/75R17 30.88 in (−0.56%)
- 275/50R20 30.83 in (−0.72%)
- 295/40R22 31.29 in (+0.77%)
- 305/45R20 30.81 in (−0.79%)
- 275/45R21 30.74 in (−0.99%)
- 285/30R24 30.73 in (−1.03%)
- 265/45R22 31.39 in (+1.09%)
- 265/50R21 31.43 in (+1.23%)
- 275/40R22 30.66 in (−1.26%)
- 265/75R15 30.65 in (−1.29%)
- 285/60R18 31.46 in (+1.33%)
- 245/75R17 31.47 in (+1.34%)
- 265/55R20 31.48 in (+1.37%)
- 245/55R20 30.61 in (−1.42%)
- 265/70R16 30.61 in (−1.43%)
- 265/65R17 30.56 in (−1.57%)
- 245/65R18 30.54 in (−1.65%)
- 265/65R18 31.56 in (+1.65%)
- 265/60R18 30.52 in (−1.71%)
- 285/65R17 31.59 in (+1.72%)
- 245/70R17 30.50 in (−1.76%)
- 265/70R17 31.61 in (+1.79%)
- 305/40R22 31.61 in (+1.79%)
- 265/55R19 30.48 in (−1.85%)
- 245/75R16 30.47 in (−1.88%)
- 265/75R16 31.65 in (+1.93%)
- 295/45R20 30.45 in (−1.93%)
- 265/50R20 30.43 in (−1.99%)
- 305/35R22 30.41 in (−2.08%)
- 215/85R16 30.39 in (−2.13%)
- 265/45R21 30.39 in (−2.13%)
- 235/85R16 31.73 in (+2.18%)
- 275/45R22 31.74 in (+2.23%)
- 265/40R22 30.35 in (−2.27%)
- 235/80R17 31.80 in (+2.42%)
- 295/40R21 30.29 in (−2.45%)
- 225/75R17 30.29 in (−2.46%)
- 275/50R21 31.83 in (+2.50%)
- 275/55R20 31.91 in (+2.76%)
- 235/55R20 30.18 in (−2.81%)
Open 255/65R18 in the tire size calculator
Source: Calculated from standard tire geometry formulas. Verified . How these numbers are calculated.