Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/40-20 | 285/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.66 (728) | 28.98 (736) | 0.31 (8) 1.1% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 90.04 (2287.08) | 91.03 (2312.21) | 0.99 (25.13) 1.1% |
| Sidewall Height inches (mm) | 4.33 (110) | 4.49 (114) | 0.16 (4) 3.6% |
| Revolutions per mile (km) | 703.67 (437.24) | 696.02 (432.49) | -7.65 (-4.75) -1.1% |
285/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.22 mph (32.54 km/h) |
| 25 mph (40.23 km/h) | 25.27 mph (40.68 km/h) |
| 30 mph (48.28 km/h) | 30.33 mph (48.81 km/h) |
| 35 mph (56.33 km/h) | 35.38 mph (56.95 km/h) |
| 40 mph (64.37 km/h) | 40.44 mph (65.08 km/h) |
| 45 mph (72.42 km/h) | 45.49 mph (73.22 km/h) |
| 50 mph (80.47 km/h) | 50.55 mph (81.35 km/h) |
| 55 mph (88.51 km/h) | 55.6 mph (89.49 km/h) |
| 60 mph (96.56 km/h) | 60.66 mph (97.62 km/h) |
| 65 mph (104.61 km/h) | 65.71 mph (105.76 km/h) |
| 70 mph (112.65 km/h) | 70.77 mph (113.89 km/h) |
| 75 mph (120.7 km/h) | 75.82 mph (122.03 km/h) |
| 80 mph (128.75 km/h) | 80.88 mph (130.16 km/h) |
| 85 mph (136.79 km/h) | 85.93 mph (138.3 km/h) |
| 90 mph (144.84 km/h) | 90.99 mph (146.43 km/h) |
| 95 mph (152.89 km/h) | 96.04 mph (154.57 km/h) |
| 100 mph (160.93 km/h) | 101.1 mph (162.7 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1771 | 2058 | 2216 | 2314 | 2419 | 2495 | 2578 | 2676 | 2811 | 2947 | 3098 | 3218 | 3437 | 3678 | 3867 | 3987 | 4055 | 4304 | 4650 | 5404 |
Better Fuel Economy Factory Ratios Increased Power
