Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/70-18 | 285/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.71 (856.2) | 33.46 (850) | -0.24 (-6.2) -0.7% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 105.9 (2689.83) | 105.13 (2670.35) | -0.77 (-19.48) -0.7% |
| Sidewall Height inches (mm) | 7.85 (199.5) | 6.73 (171) | -1.12 (-28.5) -14.3% |
| Revolutions per mile (km) | 598.31 (371.77) | 602.67 (374.48) | 4.36 (2.71) 0.7% |
285/60-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.86 mph (31.95 km/h) |
| 25 mph (40.23 km/h) | 24.82 mph (39.94 km/h) |
| 30 mph (48.28 km/h) | 29.78 mph (47.93 km/h) |
| 35 mph (56.33 km/h) | 34.75 mph (55.92 km/h) |
| 40 mph (64.37 km/h) | 39.71 mph (63.91 km/h) |
| 45 mph (72.42 km/h) | 44.67 mph (71.9 km/h) |
| 50 mph (80.47 km/h) | 49.64 mph (79.88 km/h) |
| 55 mph (88.51 km/h) | 54.6 mph (87.87 km/h) |
| 60 mph (96.56 km/h) | 59.57 mph (95.86 km/h) |
| 65 mph (104.61 km/h) | 64.53 mph (103.85 km/h) |
| 70 mph (112.65 km/h) | 69.49 mph (111.84 km/h) |
| 75 mph (120.7 km/h) | 74.46 mph (119.83 km/h) |
| 80 mph (128.75 km/h) | 79.42 mph (127.82 km/h) |
| 85 mph (136.79 km/h) | 84.38 mph (135.8 km/h) |
| 90 mph (144.84 km/h) | 89.35 mph (143.79 km/h) |
| 95 mph (152.89 km/h) | 94.31 mph (151.78 km/h) |
| 100 mph (160.93 km/h) | 99.28 mph (159.77 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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