Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/50-20 | 285/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.22 (793) | 33.46 (850) | 2.24 (57) 7.2% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 98.08 (2491.28) | 105.13 (2670.35) | 7.05 (179.07) 7.2% |
| Sidewall Height inches (mm) | 5.61 (142.5) | 6.73 (171) | 1.12 (28.5) 20% |
| Revolutions per mile (km) | 645.99 (401.4) | 602.67 (374.48) | -43.32 (-26.92) -6.7% |
285/60-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.44 mph (34.5 km/h) |
| 25 mph (40.23 km/h) | 26.8 mph (43.13 km/h) |
| 30 mph (48.28 km/h) | 32.16 mph (51.75 km/h) |
| 35 mph (56.33 km/h) | 37.52 mph (60.38 km/h) |
| 40 mph (64.37 km/h) | 42.88 mph (69 km/h) |
| 45 mph (72.42 km/h) | 48.23 mph (77.63 km/h) |
| 50 mph (80.47 km/h) | 53.59 mph (86.25 km/h) |
| 55 mph (88.51 km/h) | 58.95 mph (94.88 km/h) |
| 60 mph (96.56 km/h) | 64.31 mph (103.5 km/h) |
| 65 mph (104.61 km/h) | 69.67 mph (112.13 km/h) |
| 70 mph (112.65 km/h) | 75.03 mph (120.75 km/h) |
| 75 mph (120.7 km/h) | 80.39 mph (129.38 km/h) |
| 80 mph (128.75 km/h) | 85.75 mph (138 km/h) |
| 85 mph (136.79 km/h) | 91.11 mph (146.63 km/h) |
| 90 mph (144.84 km/h) | 96.47 mph (155.25 km/h) |
| 95 mph (152.89 km/h) | 101.83 mph (163.88 km/h) |
| 100 mph (160.93 km/h) | 107.19 mph (172.5 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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