Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/45-21 | 285/40-22 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.1 (789.9) | 30.98 (786.8) | -0.12 (-3.1) -0.4% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 97.7 (2481.54) | 97.32 (2471.81) | -0.38 (-9.74) -0.4% |
| Sidewall Height inches (mm) | 5.05 (128.25) | 4.49 (114) | -0.56 (-14.25) -11.1% |
| Revolutions per mile (km) | 648.53 (402.97) | 651.08 (404.56) | 2.56 (1.59) 0.4% |
285/40-22 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.92 mph (32.06 km/h) |
| 25 mph (40.23 km/h) | 24.9 mph (40.08 km/h) |
| 30 mph (48.28 km/h) | 29.88 mph (48.09 km/h) |
| 35 mph (56.33 km/h) | 34.86 mph (56.11 km/h) |
| 40 mph (64.37 km/h) | 39.84 mph (64.12 km/h) |
| 45 mph (72.42 km/h) | 44.82 mph (72.14 km/h) |
| 50 mph (80.47 km/h) | 49.8 mph (80.15 km/h) |
| 55 mph (88.51 km/h) | 54.78 mph (88.17 km/h) |
| 60 mph (96.56 km/h) | 59.76 mph (96.18 km/h) |
| 65 mph (104.61 km/h) | 64.74 mph (104.2 km/h) |
| 70 mph (112.65 km/h) | 69.73 mph (112.21 km/h) |
| 75 mph (120.7 km/h) | 74.71 mph (120.23 km/h) |
| 80 mph (128.75 km/h) | 79.69 mph (128.24 km/h) |
| 85 mph (136.79 km/h) | 84.67 mph (136.26 km/h) |
| 90 mph (144.84 km/h) | 89.65 mph (144.27 km/h) |
| 95 mph (152.89 km/h) | 94.63 mph (152.29 km/h) |
| 100 mph (160.93 km/h) | 99.61 mph (160.3 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1657 | 1925 | 2073 | 2165 | 2263 | 2334 | 2411 | 2503 | 2630 | 2757 | 2898 | 3011 | 3215 | 3441 | 3617 | 3730 | 3793 | 4026 | 4350 | 5055 |
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