Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/40-17 | 305/45-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.66 (651.8) | 27.81 (706.3) | 2.15 (54.5) 8.4% |
| Width inches (mm) | 10.83 (275) | 12.01 (305) | 1.18 (30) 10.9% |
| Circum. inches (mm) | 80.62 (2047.69) | 87.36 (2218.91) | 6.74 (171.22) 8.4% |
| Sidewall Height inches (mm) | 4.33 (110) | 5.4 (137.25) | 1.07 (27.25) 24.8% |
| Revolutions per mile (km) | 785.93 (488.35) | 725.29 (450.67) | -60.64 (-37.68) -7.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.67 mph (34.88 km/h) |
| 25 mph (40.23 km/h) | 27.09 mph (43.6 km/h) |
| 30 mph (48.28 km/h) | 32.51 mph (52.32 km/h) |
| 35 mph (56.33 km/h) | 37.93 mph (61.04 km/h) |
| 40 mph (64.37 km/h) | 43.34 mph (69.76 km/h) |
| 45 mph (72.42 km/h) | 48.76 mph (78.48 km/h) |
| 50 mph (80.47 km/h) | 54.18 mph (87.2 km/h) |
| 55 mph (88.51 km/h) | 59.6 mph (95.92 km/h) |
| 60 mph (96.56 km/h) | 65.02 mph (104.63 km/h) |
| 65 mph (104.61 km/h) | 70.43 mph (113.35 km/h) |
| 70 mph (112.65 km/h) | 75.85 mph (122.07 km/h) |
| 75 mph (120.7 km/h) | 81.27 mph (130.79 km/h) |
| 80 mph (128.75 km/h) | 86.69 mph (139.51 km/h) |
| 85 mph (136.79 km/h) | 92.11 mph (148.23 km/h) |
| 90 mph (144.84 km/h) | 97.53 mph (156.95 km/h) |
| 95 mph (152.89 km/h) | 102.94 mph (165.67 km/h) |
| 100 mph (160.93 km/h) | 108.36 mph (174.39 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
