305/55R20 tire size
A 305/55R20 tire is 33.21 in (843.5 mm) tall and 12.01 in (305.0 mm) wide, and turns 607 revolutions per mile.
- 33.21 inOverall diameter
- 6.60 inSidewall height
- 607Revolutions per mile
- 33.2x12.0R20Flotation equivalent
| Measurement | Inches | Millimeters |
|---|---|---|
| Overall diameter | 33.21 in | 843.5 mm |
| Section width | 12.01 in | 305.0 mm |
| Sidewall height | 6.60 in | 167.8 mm |
| Rim diameter | 20.00 in | 508.0 mm |
| Circumference | 104.33 in | 2,650 mm |
| Revolutions per mile | 607 | |
| Flotation equivalent | 33.2x12.0R20 (approx.) | |
305/55R20 is a 20-inch tire with a 305 mm (12.01 in) section width and a 55% aspect ratio, giving a 6.60-inch sidewall and a flotation-style size of about 33.2x12.0R20.
Its overall diameter is 33.21 inches, so it rolls 104.3 inches per revolution and turns about 607 times per mile.
29 other sizes in this list are within 3% of that diameter.
Compare 305/55R20 with plausible swaps
- 285/65R18 vs 305/55R20 (−1.87%)
- 265/70R18 vs 305/55R20 (−1.81%)
- 33x12.50R18 vs 305/55R20 (−0.63%)
- 275/70R18 vs 305/55R20 (−0.15%)
- 285/70R18 vs 305/55R20 (+1.51%)
- 305/50R20 vs 305/55R20 (−3.62%)
- 285/55R20 vs 305/55R20 (−2.61%)
- 265/60R20 vs 305/55R20 (−2.07%)
- 295/55R20 vs 305/55R20 (−1.30%)
- 275/60R20 vs 305/55R20 (−0.65%)
- 33x12.50R20 vs 305/55R20 (−0.63%)
- 305/55R20 vs 285/60R20 (+0.77%)
- 305/55R20 vs 295/60R20 (+2.19%)
- 305/55R20 vs 275/65R20 (+2.61%)
- 305/55R20 vs 305/45R22 (−1.21%)
- 305/55R20 vs 33x12.50R22 (−0.63%)
- 305/55R20 vs 285/50R22 (+0.04%)
- 305/55R20 vs 325/45R22 (+0.92%)
- 305/55R20 vs 325/50R22 (+4.78%)
Sizes within 3% of 33.21 in diameter
- 285/50R22 33.22 in (+0.04%)
- 295/70R17 33.26 in (+0.15%)
- 275/70R18 33.16 in (−0.15%)
- 255/85R16 33.07 in (−0.43%)
- 255/80R17 33.06 in (−0.44%)
- 33x12.50R15 33.00 in (−0.63%)
- 33x12.50R16 33.00 in (−0.63%)
- 33x12.50R18 33.00 in (−0.63%)
- 33x12.50R20 33.00 in (−0.63%)
- 33x12.50R17 33.00 in (−0.63%)
- 33x12.50R22 33.00 in (−0.63%)
- 275/60R20 32.99 in (−0.65%)
- 285/60R20 33.46 in (+0.77%)
- 325/45R22 33.52 in (+0.92%)
- 285/75R16 32.83 in (−1.14%)
- 305/70R16 32.81 in (−1.20%)
- 305/45R22 32.81 in (−1.21%)
- 295/55R20 32.78 in (−1.30%)
- 285/70R17 32.71 in (−1.51%)
- 285/70R18 33.71 in (+1.51%)
- 305/65R17 32.61 in (−1.80%)
- 265/70R18 32.61 in (−1.81%)
- 285/75R17 33.83 in (+1.87%)
- 285/65R18 32.59 in (−1.87%)
- 265/60R20 32.52 in (−2.07%)
- 295/60R20 33.94 in (+2.19%)
- 305/35R24 32.41 in (−2.42%)
- 285/55R20 32.34 in (−2.61%)
- 275/65R20 34.07 in (+2.61%)
Open 305/55R20 in the tire size calculator
Source: Calculated from standard tire geometry formulas. Verified . How these numbers are calculated.