Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/80-19 | 120/90-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.56 (674.6) | 25.5 (647.8) | -1.06 (-26.8) -4% |
| Width inches (mm) | 4.72 (120) | 4.72 (120) | 0 (0) 0% |
| Circum. inches (mm) | 83.44 (2119.32) | 80.12 (2035.12) | -3.31 (-84.19) -4% |
| Sidewall Height inches (mm) | 3.78 (96) | 4.25 (108) | 0.47 (12) 12.5% |
| Revolutions per mile (km) | 759.37 (471.85) | 790.78 (491.37) | 31.42 (19.52) 4.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.21 mph (30.91 km/h) |
| 25 mph (40.23 km/h) | 24.01 mph (38.64 km/h) |
| 30 mph (48.28 km/h) | 28.81 mph (46.36 km/h) |
| 35 mph (56.33 km/h) | 33.61 mph (54.09 km/h) |
| 40 mph (64.37 km/h) | 38.41 mph (61.82 km/h) |
| 45 mph (72.42 km/h) | 43.21 mph (69.54 km/h) |
| 50 mph (80.47 km/h) | 48.01 mph (77.27 km/h) |
| 55 mph (88.51 km/h) | 52.82 mph (85 km/h) |
| 60 mph (96.56 km/h) | 57.62 mph (92.72 km/h) |
| 65 mph (104.61 km/h) | 62.42 mph (100.45 km/h) |
| 70 mph (112.65 km/h) | 67.22 mph (108.18 km/h) |
| 75 mph (120.7 km/h) | 72.02 mph (115.91 km/h) |
| 80 mph (128.75 km/h) | 76.82 mph (123.63 km/h) |
| 85 mph (136.79 km/h) | 81.62 mph (131.36 km/h) |
| 90 mph (144.84 km/h) | 86.42 mph (139.09 km/h) |
| 95 mph (152.89 km/h) | 91.23 mph (146.81 km/h) |
| 100 mph (160.93 km/h) | 96.03 mph (154.54 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2012 | 2338 | 2518 | 2629 | 2749 | 2834 | 2929 | 3040 | 3194 | 3348 | 3520 | 3657 | 3905 | 4179 | 4393 | 4530 | 4607 | 4890 | 5284 | 6140 |
Better Fuel Economy Factory Ratios Increased Power
