Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/60-18 | 285/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.46 (799.2) | 33.46 (850) | 2 (50.8) 6.4% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 98.85 (2510.76) | 105.13 (2670.35) | 6.28 (159.59) 6.4% |
| Sidewall Height inches (mm) | 6.73 (171) | 6.73 (171) | 0 (0) 0% |
| Revolutions per mile (km) | 640.98 (398.28) | 602.67 (374.48) | -38.31 (-23.8) -6% |
285/60-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.27 mph (34.23 km/h) |
| 25 mph (40.23 km/h) | 26.59 mph (42.79 km/h) |
| 30 mph (48.28 km/h) | 31.91 mph (51.35 km/h) |
| 35 mph (56.33 km/h) | 37.22 mph (59.91 km/h) |
| 40 mph (64.37 km/h) | 42.54 mph (68.47 km/h) |
| 45 mph (72.42 km/h) | 47.86 mph (77.02 km/h) |
| 50 mph (80.47 km/h) | 53.18 mph (85.58 km/h) |
| 55 mph (88.51 km/h) | 58.5 mph (94.14 km/h) |
| 60 mph (96.56 km/h) | 63.81 mph (102.7 km/h) |
| 65 mph (104.61 km/h) | 69.13 mph (111.26 km/h) |
| 70 mph (112.65 km/h) | 74.45 mph (119.82 km/h) |
| 75 mph (120.7 km/h) | 79.77 mph (128.37 km/h) |
| 80 mph (128.75 km/h) | 85.09 mph (136.93 km/h) |
| 85 mph (136.79 km/h) | 90.4 mph (145.49 km/h) |
| 90 mph (144.84 km/h) | 95.72 mph (154.05 km/h) |
| 95 mph (152.89 km/h) | 101.04 mph (162.61 km/h) |
| 100 mph (160.93 km/h) | 106.36 mph (171.16 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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