Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/75-18 | 305/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.83 (884.7) | 34.81 (884.2) | -0.02 (-0.5) -0.1% |
| Width inches (mm) | 11.22 (285) | 12.01 (305) | 0.79 (20) 7% |
| Circum. inches (mm) | 109.42 (2779.37) | 109.36 (2777.8) | -0.06 (-1.57) -0.1% |
| Sidewall Height inches (mm) | 8.42 (213.75) | 8.41 (213.5) | -0.01 (-0.25) -0.1% |
| Revolutions per mile (km) | 579.03 (359.79) | 579.36 (360) | 0.33 (0.2) 0.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.99 mph (32.17 km/h) |
| 25 mph (40.23 km/h) | 24.99 mph (40.21 km/h) |
| 30 mph (48.28 km/h) | 29.98 mph (48.25 km/h) |
| 35 mph (56.33 km/h) | 34.98 mph (56.3 km/h) |
| 40 mph (64.37 km/h) | 39.98 mph (64.34 km/h) |
| 45 mph (72.42 km/h) | 44.97 mph (72.38 km/h) |
| 50 mph (80.47 km/h) | 49.97 mph (80.42 km/h) |
| 55 mph (88.51 km/h) | 54.97 mph (88.46 km/h) |
| 60 mph (96.56 km/h) | 59.97 mph (96.51 km/h) |
| 65 mph (104.61 km/h) | 64.96 mph (104.55 km/h) |
| 70 mph (112.65 km/h) | 69.96 mph (112.59 km/h) |
| 75 mph (120.7 km/h) | 74.96 mph (120.63 km/h) |
| 80 mph (128.75 km/h) | 79.95 mph (128.68 km/h) |
| 85 mph (136.79 km/h) | 84.95 mph (136.72 km/h) |
| 90 mph (144.84 km/h) | 89.95 mph (144.76 km/h) |
| 95 mph (152.89 km/h) | 94.95 mph (152.8 km/h) |
| 100 mph (160.93 km/h) | 99.94 mph (160.84 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1474 | 1713 | 1845 | 1926 | 2014 | 2077 | 2146 | 2227 | 2340 | 2453 | 2579 | 2679 | 2861 | 3062 | 3218 | 3319 | 3375 | 3582 | 3871 | 4498 |
Better Fuel Economy Factory Ratios Increased Power
