Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/50-20 | 285/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.22 (793) | 31.46 (799.2) | 0.24 (6.2) 0.8% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 98.08 (2491.28) | 98.85 (2510.76) | 0.77 (19.48) 0.8% |
| Sidewall Height inches (mm) | 5.61 (142.5) | 6.73 (171) | 1.12 (28.5) 20% |
| Revolutions per mile (km) | 645.99 (401.4) | 640.98 (398.28) | -5.01 (-3.11) -0.8% |
285/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.16 mph (32.44 km/h) |
| 25 mph (40.23 km/h) | 25.2 mph (40.55 km/h) |
| 30 mph (48.28 km/h) | 30.23 mph (48.66 km/h) |
| 35 mph (56.33 km/h) | 35.27 mph (56.77 km/h) |
| 40 mph (64.37 km/h) | 40.31 mph (64.88 km/h) |
| 45 mph (72.42 km/h) | 45.35 mph (72.99 km/h) |
| 50 mph (80.47 km/h) | 50.39 mph (81.1 km/h) |
| 55 mph (88.51 km/h) | 55.43 mph (89.21 km/h) |
| 60 mph (96.56 km/h) | 60.47 mph (97.32 km/h) |
| 65 mph (104.61 km/h) | 65.51 mph (105.43 km/h) |
| 70 mph (112.65 km/h) | 70.55 mph (113.54 km/h) |
| 75 mph (120.7 km/h) | 75.59 mph (121.64 km/h) |
| 80 mph (128.75 km/h) | 80.63 mph (129.75 km/h) |
| 85 mph (136.79 km/h) | 85.66 mph (137.86 km/h) |
| 90 mph (144.84 km/h) | 90.7 mph (145.97 km/h) |
| 95 mph (152.89 km/h) | 95.74 mph (154.08 km/h) |
| 100 mph (160.93 km/h) | 100.78 mph (162.19 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1631 | 1895 | 2041 | 2131 | 2228 | 2298 | 2374 | 2464 | 2589 | 2714 | 2853 | 2964 | 3165 | 3387 | 3561 | 3672 | 3734 | 3963 | 4283 | 4977 |
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