Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/55-20 | 285/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.34 (821.5) | 33.46 (850) | 1.12 (28.5) 3.5% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 101.61 (2580.82) | 105.13 (2670.35) | 3.53 (89.54) 3.5% |
| Sidewall Height inches (mm) | 6.17 (156.75) | 6.73 (171) | 0.56 (14.25) 9.1% |
| Revolutions per mile (km) | 623.58 (387.47) | 602.67 (374.48) | -20.91 (-12.99) -3.4% |
285/60-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.69 mph (33.3 km/h) |
| 25 mph (40.23 km/h) | 25.87 mph (41.63 km/h) |
| 30 mph (48.28 km/h) | 31.04 mph (49.96 km/h) |
| 35 mph (56.33 km/h) | 36.21 mph (58.28 km/h) |
| 40 mph (64.37 km/h) | 41.39 mph (66.61 km/h) |
| 45 mph (72.42 km/h) | 46.56 mph (74.93 km/h) |
| 50 mph (80.47 km/h) | 51.73 mph (83.26 km/h) |
| 55 mph (88.51 km/h) | 56.91 mph (91.58 km/h) |
| 60 mph (96.56 km/h) | 62.08 mph (99.91 km/h) |
| 65 mph (104.61 km/h) | 67.26 mph (108.24 km/h) |
| 70 mph (112.65 km/h) | 72.43 mph (116.56 km/h) |
| 75 mph (120.7 km/h) | 77.6 mph (124.89 km/h) |
| 80 mph (128.75 km/h) | 82.78 mph (133.21 km/h) |
| 85 mph (136.79 km/h) | 87.95 mph (141.54 km/h) |
| 90 mph (144.84 km/h) | 93.12 mph (149.87 km/h) |
| 95 mph (152.89 km/h) | 98.3 mph (158.19 km/h) |
| 100 mph (160.93 km/h) | 103.47 mph (166.52 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1534 | 1782 | 1919 | 2004 | 2095 | 2160 | 2232 | 2317 | 2434 | 2552 | 2682 | 2787 | 2976 | 3185 | 3348 | 3452 | 3511 | 3727 | 4027 | 4679 |
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