Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/40-20 | 285/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.98 (736) | 27.85 (707.5) | -1.12 (-28.5) -3.9% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 91.03 (2312.21) | 87.51 (2222.68) | -3.53 (-89.54) -3.9% |
| Sidewall Height inches (mm) | 4.49 (114) | 3.93 (99.75) | -0.56 (-14.25) -12.5% |
| Revolutions per mile (km) | 696.02 (432.49) | 724.06 (449.91) | 28.04 (17.42) 4% |
285/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.23 mph (30.94 km/h) |
| 25 mph (40.23 km/h) | 24.03 mph (38.68 km/h) |
| 30 mph (48.28 km/h) | 28.84 mph (46.41 km/h) |
| 35 mph (56.33 km/h) | 33.64 mph (54.15 km/h) |
| 40 mph (64.37 km/h) | 38.45 mph (61.88 km/h) |
| 45 mph (72.42 km/h) | 43.26 mph (69.62 km/h) |
| 50 mph (80.47 km/h) | 48.06 mph (77.35 km/h) |
| 55 mph (88.51 km/h) | 52.87 mph (85.09 km/h) |
| 60 mph (96.56 km/h) | 57.68 mph (92.82 km/h) |
| 65 mph (104.61 km/h) | 62.48 mph (100.56 km/h) |
| 70 mph (112.65 km/h) | 67.29 mph (108.29 km/h) |
| 75 mph (120.7 km/h) | 72.1 mph (116.03 km/h) |
| 80 mph (128.75 km/h) | 76.9 mph (123.76 km/h) |
| 85 mph (136.79 km/h) | 81.71 mph (131.5 km/h) |
| 90 mph (144.84 km/h) | 86.51 mph (139.23 km/h) |
| 95 mph (152.89 km/h) | 91.32 mph (146.97 km/h) |
| 100 mph (160.93 km/h) | 96.13 mph (154.7 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1843 | 2141 | 2305 | 2407 | 2517 | 2595 | 2682 | 2783 | 2925 | 3066 | 3223 | 3348 | 3575 | 3826 | 4022 | 4148 | 4218 | 4477 | 4838 | 5622 |
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