Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 270/80-18 | 305/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.01 (889.2) | 34.81 (884.2) | -0.2 (-5) -0.6% |
| Width inches (mm) | 10.63 (270) | 12.01 (305) | 1.38 (35) 13% |
| Circum. inches (mm) | 109.98 (2793.5) | 109.36 (2777.8) | -0.62 (-15.71) -0.6% |
| Sidewall Height inches (mm) | 8.5 (216) | 8.41 (213.5) | -0.1 (-2.5) -1.2% |
| Revolutions per mile (km) | 576.1 (357.97) | 579.36 (360) | 3.26 (2.02) 0.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.89 mph (32.01 km/h) |
| 25 mph (40.23 km/h) | 24.86 mph (40.01 km/h) |
| 30 mph (48.28 km/h) | 29.83 mph (48.01 km/h) |
| 35 mph (56.33 km/h) | 34.8 mph (56.01 km/h) |
| 40 mph (64.37 km/h) | 39.78 mph (64.01 km/h) |
| 45 mph (72.42 km/h) | 44.75 mph (72.01 km/h) |
| 50 mph (80.47 km/h) | 49.72 mph (80.01 km/h) |
| 55 mph (88.51 km/h) | 54.69 mph (88.02 km/h) |
| 60 mph (96.56 km/h) | 59.66 mph (96.02 km/h) |
| 65 mph (104.61 km/h) | 64.63 mph (104.02 km/h) |
| 70 mph (112.65 km/h) | 69.61 mph (112.02 km/h) |
| 75 mph (120.7 km/h) | 74.58 mph (120.02 km/h) |
| 80 mph (128.75 km/h) | 79.55 mph (128.02 km/h) |
| 85 mph (136.79 km/h) | 84.52 mph (136.03 km/h) |
| 90 mph (144.84 km/h) | 89.49 mph (144.03 km/h) |
| 95 mph (152.89 km/h) | 94.47 mph (152.03 km/h) |
| 100 mph (160.93 km/h) | 99.44 mph (160.03 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
