Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/45-18 | 305/45-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.81 (731.7) | 27.81 (706.3) | -1 (-25.4) -3.5% |
| Width inches (mm) | 12.01 (305) | 12.01 (305) | 0 (0) 0% |
| Circum. inches (mm) | 90.5 (2298.7) | 87.36 (2218.91) | -3.14 (-79.8) -3.5% |
| Sidewall Height inches (mm) | 5.4 (137.25) | 5.4 (137.25) | 0 (0) 0% |
| Revolutions per mile (km) | 700.11 (435.03) | 725.29 (450.67) | 25.18 (15.64) 3.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.31 mph (31.07 km/h) |
| 25 mph (40.23 km/h) | 24.13 mph (38.84 km/h) |
| 30 mph (48.28 km/h) | 28.96 mph (46.6 km/h) |
| 35 mph (56.33 km/h) | 33.79 mph (54.37 km/h) |
| 40 mph (64.37 km/h) | 38.61 mph (62.14 km/h) |
| 45 mph (72.42 km/h) | 43.44 mph (69.91 km/h) |
| 50 mph (80.47 km/h) | 48.26 mph (77.67 km/h) |
| 55 mph (88.51 km/h) | 53.09 mph (85.44 km/h) |
| 60 mph (96.56 km/h) | 57.92 mph (93.21 km/h) |
| 65 mph (104.61 km/h) | 62.74 mph (100.98 km/h) |
| 70 mph (112.65 km/h) | 67.57 mph (108.74 km/h) |
| 75 mph (120.7 km/h) | 72.4 mph (116.51 km/h) |
| 80 mph (128.75 km/h) | 77.22 mph (124.28 km/h) |
| 85 mph (136.79 km/h) | 82.05 mph (132.05 km/h) |
| 90 mph (144.84 km/h) | 86.88 mph (139.81 km/h) |
| 95 mph (152.89 km/h) | 91.7 mph (147.58 km/h) |
| 100 mph (160.93 km/h) | 96.53 mph (155.35 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
