Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/80-19 | 120/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.56 (674.6) | 26.5 (673.2) | -0.06 (-1.4) -0.2% |
| Width inches (mm) | 4.72 (120) | 4.72 (120) | 0 (0) 0% |
| Circum. inches (mm) | 83.44 (2119.32) | 83.26 (2114.92) | -0.17 (-4.4) -0.2% |
| Sidewall Height inches (mm) | 3.78 (96) | 4.25 (108) | 0.47 (12) 12.5% |
| Revolutions per mile (km) | 759.37 (471.85) | 760.95 (472.83) | 1.58 (0.98) 0.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.96 mph (32.12 km/h) |
| 25 mph (40.23 km/h) | 24.95 mph (40.15 km/h) |
| 30 mph (48.28 km/h) | 29.94 mph (48.18 km/h) |
| 35 mph (56.33 km/h) | 34.93 mph (56.21 km/h) |
| 40 mph (64.37 km/h) | 39.92 mph (64.24 km/h) |
| 45 mph (72.42 km/h) | 44.91 mph (72.27 km/h) |
| 50 mph (80.47 km/h) | 49.9 mph (80.3 km/h) |
| 55 mph (88.51 km/h) | 54.89 mph (88.33 km/h) |
| 60 mph (96.56 km/h) | 59.88 mph (96.36 km/h) |
| 65 mph (104.61 km/h) | 64.87 mph (104.39 km/h) |
| 70 mph (112.65 km/h) | 69.85 mph (112.42 km/h) |
| 75 mph (120.7 km/h) | 74.84 mph (120.45 km/h) |
| 80 mph (128.75 km/h) | 79.83 mph (128.48 km/h) |
| 85 mph (136.79 km/h) | 84.82 mph (136.51 km/h) |
| 90 mph (144.84 km/h) | 89.81 mph (144.54 km/h) |
| 95 mph (152.89 km/h) | 94.8 mph (152.57 km/h) |
| 100 mph (160.93 km/h) | 99.79 mph (160.6 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1936 | 2250 | 2423 | 2530 | 2645 | 2728 | 2818 | 2925 | 3074 | 3222 | 3387 | 3519 | 3758 | 4021 | 4227 | 4359 | 4433 | 4705 | 5084 | 5908 |
Better Fuel Economy Factory Ratios Increased Power
