Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/40-17 | 305/45-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.98 (659.8) | 27.81 (706.3) | 1.83 (46.5) 7% |
| Width inches (mm) | 11.22 (285) | 12.01 (305) | 0.79 (20) 7% |
| Circum. inches (mm) | 81.61 (2072.82) | 87.36 (2218.91) | 5.75 (146.08) 7% |
| Sidewall Height inches (mm) | 4.49 (114) | 5.4 (137.25) | 0.92 (23.25) 20.4% |
| Revolutions per mile (km) | 776.4 (482.43) | 725.29 (450.67) | -51.12 (-31.76) -6.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.41 mph (34.46 km/h) |
| 25 mph (40.23 km/h) | 26.76 mph (43.07 km/h) |
| 30 mph (48.28 km/h) | 32.11 mph (51.68 km/h) |
| 35 mph (56.33 km/h) | 37.47 mph (60.3 km/h) |
| 40 mph (64.37 km/h) | 42.82 mph (68.91 km/h) |
| 45 mph (72.42 km/h) | 48.17 mph (77.52 km/h) |
| 50 mph (80.47 km/h) | 53.52 mph (86.14 km/h) |
| 55 mph (88.51 km/h) | 58.88 mph (94.75 km/h) |
| 60 mph (96.56 km/h) | 64.23 mph (103.37 km/h) |
| 65 mph (104.61 km/h) | 69.58 mph (111.98 km/h) |
| 70 mph (112.65 km/h) | 74.93 mph (120.59 km/h) |
| 75 mph (120.7 km/h) | 80.29 mph (129.21 km/h) |
| 80 mph (128.75 km/h) | 85.64 mph (137.82 km/h) |
| 85 mph (136.79 km/h) | 90.99 mph (146.44 km/h) |
| 90 mph (144.84 km/h) | 96.34 mph (155.05 km/h) |
| 95 mph (152.89 km/h) | 101.7 mph (163.66 km/h) |
| 100 mph (160.93 km/h) | 107.05 mph (172.28 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1846 | 2144 | 2309 | 2411 | 2521 | 2600 | 2686 | 2788 | 2930 | 3071 | 3228 | 3354 | 3581 | 3833 | 4029 | 4155 | 4226 | 4485 | 4846 | 5631 |
Better Fuel Economy Factory Ratios Increased Power
