Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/45-18 | 305/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.1 (713.7) | 28.81 (731.7) | 0.71 (18) 2.5% |
| Width inches (mm) | 11.22 (285) | 12.01 (305) | 0.79 (20) 7% |
| Circum. inches (mm) | 88.27 (2242.15) | 90.5 (2298.7) | 2.23 (56.55) 2.5% |
| Sidewall Height inches (mm) | 5.05 (128.25) | 5.4 (137.25) | 0.35 (9) 7% |
| Revolutions per mile (km) | 717.77 (446) | 700.11 (435.03) | -17.66 (-10.97) -2.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.5 mph (33 km/h) |
| 25 mph (40.23 km/h) | 25.63 mph (41.25 km/h) |
| 30 mph (48.28 km/h) | 30.76 mph (49.5 km/h) |
| 35 mph (56.33 km/h) | 35.88 mph (57.75 km/h) |
| 40 mph (64.37 km/h) | 41.01 mph (66 km/h) |
| 45 mph (72.42 km/h) | 46.13 mph (74.25 km/h) |
| 50 mph (80.47 km/h) | 51.26 mph (82.5 km/h) |
| 55 mph (88.51 km/h) | 56.39 mph (90.75 km/h) |
| 60 mph (96.56 km/h) | 61.51 mph (99 km/h) |
| 65 mph (104.61 km/h) | 66.64 mph (107.25 km/h) |
| 70 mph (112.65 km/h) | 71.77 mph (115.5 km/h) |
| 75 mph (120.7 km/h) | 76.89 mph (123.75 km/h) |
| 80 mph (128.75 km/h) | 82.02 mph (131.99 km/h) |
| 85 mph (136.79 km/h) | 87.14 mph (140.24 km/h) |
| 90 mph (144.84 km/h) | 92.27 mph (148.49 km/h) |
| 95 mph (152.89 km/h) | 97.4 mph (156.74 km/h) |
| 100 mph (160.93 km/h) | 102.52 mph (164.99 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
