Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/35-18 | 305/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.41 (670.7) | 28.81 (731.7) | 2.4 (61) 9.1% |
| Width inches (mm) | 12.01 (305) | 12.01 (305) | 0 (0) 0% |
| Circum. inches (mm) | 82.96 (2107.07) | 90.5 (2298.7) | 7.54 (191.64) 9.1% |
| Sidewall Height inches (mm) | 4.2 (106.75) | 5.4 (137.25) | 1.2 (30.5) 28.6% |
| Revolutions per mile (km) | 763.78 (474.59) | 700.11 (435.03) | -63.67 (-39.57) -8.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.82 mph (35.11 km/h) |
| 25 mph (40.23 km/h) | 27.27 mph (43.89 km/h) |
| 30 mph (48.28 km/h) | 32.73 mph (52.67 km/h) |
| 35 mph (56.33 km/h) | 38.18 mph (61.45 km/h) |
| 40 mph (64.37 km/h) | 43.64 mph (70.23 km/h) |
| 45 mph (72.42 km/h) | 49.09 mph (79.01 km/h) |
| 50 mph (80.47 km/h) | 54.55 mph (87.79 km/h) |
| 55 mph (88.51 km/h) | 60 mph (96.56 km/h) |
| 60 mph (96.56 km/h) | 65.46 mph (105.34 km/h) |
| 65 mph (104.61 km/h) | 70.91 mph (114.12 km/h) |
| 70 mph (112.65 km/h) | 76.37 mph (122.9 km/h) |
| 75 mph (120.7 km/h) | 81.82 mph (131.68 km/h) |
| 80 mph (128.75 km/h) | 87.28 mph (140.46 km/h) |
| 85 mph (136.79 km/h) | 92.73 mph (149.24 km/h) |
| 90 mph (144.84 km/h) | 98.19 mph (158.01 km/h) |
| 95 mph (152.89 km/h) | 103.64 mph (166.79 km/h) |
| 100 mph (160.93 km/h) | 109.09 mph (175.57 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1782 | 2070 | 2229 | 2328 | 2434 | 2509 | 2593 | 2691 | 2828 | 2964 | 3116 | 3237 | 3457 | 3700 | 3889 | 4011 | 4079 | 4329 | 4678 | 5436 |
Better Fuel Economy Factory Ratios Increased Power
