Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/60-18 | 285/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.41 (823.2) | 32.71 (830.8) | 0.3 (7.6) 0.9% |
| Width inches (mm) | 12.01 (305) | 11.22 (285) | -0.79 (-20) -6.6% |
| Circum. inches (mm) | 101.82 (2586.16) | 102.76 (2610.04) | 0.94 (23.88) 0.9% |
| Sidewall Height inches (mm) | 7.2 (183) | 7.85 (199.5) | 0.65 (16.5) 9% |
| Revolutions per mile (km) | 622.29 (386.67) | 616.6 (383.14) | -5.69 (-3.54) -0.9% |
285/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.18 mph (32.48 km/h) |
| 25 mph (40.23 km/h) | 25.23 mph (40.61 km/h) |
| 30 mph (48.28 km/h) | 30.28 mph (48.73 km/h) |
| 35 mph (56.33 km/h) | 35.32 mph (56.85 km/h) |
| 40 mph (64.37 km/h) | 40.37 mph (64.97 km/h) |
| 45 mph (72.42 km/h) | 45.42 mph (73.09 km/h) |
| 50 mph (80.47 km/h) | 50.46 mph (81.21 km/h) |
| 55 mph (88.51 km/h) | 55.51 mph (89.33 km/h) |
| 60 mph (96.56 km/h) | 60.55 mph (97.45 km/h) |
| 65 mph (104.61 km/h) | 65.6 mph (105.57 km/h) |
| 70 mph (112.65 km/h) | 70.65 mph (113.69 km/h) |
| 75 mph (120.7 km/h) | 75.69 mph (121.82 km/h) |
| 80 mph (128.75 km/h) | 80.74 mph (129.94 km/h) |
| 85 mph (136.79 km/h) | 85.78 mph (138.06 km/h) |
| 90 mph (144.84 km/h) | 90.83 mph (146.18 km/h) |
| 95 mph (152.89 km/h) | 95.88 mph (154.3 km/h) |
| 100 mph (160.93 km/h) | 100.92 mph (162.42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1569 | 1823 | 1963 | 2050 | 2143 | 2210 | 2284 | 2370 | 2491 | 2611 | 2744 | 2851 | 3045 | 3258 | 3425 | 3532 | 3592 | 3813 | 4120 | 4788 |
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