Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/60-17 | 285/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.46 (773.8) | 33.46 (850) | 3 (76.2) 9.8% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 95.71 (2430.96) | 105.13 (2670.35) | 9.42 (239.39) 9.8% |
| Sidewall Height inches (mm) | 6.73 (171) | 6.73 (171) | 0 (0) 0% |
| Revolutions per mile (km) | 662.02 (411.36) | 602.67 (374.48) | -59.35 (-36.88) -9% |
285/60-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.97 mph (35.36 km/h) |
| 25 mph (40.23 km/h) | 27.46 mph (44.2 km/h) |
| 30 mph (48.28 km/h) | 32.95 mph (53.03 km/h) |
| 35 mph (56.33 km/h) | 38.45 mph (61.87 km/h) |
| 40 mph (64.37 km/h) | 43.94 mph (70.71 km/h) |
| 45 mph (72.42 km/h) | 49.43 mph (79.55 km/h) |
| 50 mph (80.47 km/h) | 54.92 mph (88.39 km/h) |
| 55 mph (88.51 km/h) | 60.42 mph (97.23 km/h) |
| 60 mph (96.56 km/h) | 65.91 mph (106.07 km/h) |
| 65 mph (104.61 km/h) | 71.4 mph (114.91 km/h) |
| 70 mph (112.65 km/h) | 76.89 mph (123.75 km/h) |
| 75 mph (120.7 km/h) | 82.39 mph (132.59 km/h) |
| 80 mph (128.75 km/h) | 87.88 mph (141.43 km/h) |
| 85 mph (136.79 km/h) | 93.37 mph (150.27 km/h) |
| 90 mph (144.84 km/h) | 98.86 mph (159.1 km/h) |
| 95 mph (152.89 km/h) | 104.36 mph (167.94 km/h) |
| 100 mph (160.93 km/h) | 109.85 mph (176.78 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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