Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/80-17 | 120/90-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.56 (623.8) | 25.5 (647.8) | 0.94 (24) 3.8% |
| Width inches (mm) | 4.72 (120) | 4.72 (120) | 0 (0) 0% |
| Circum. inches (mm) | 77.15 (1959.73) | 80.12 (2035.12) | 2.97 (75.4) 3.8% |
| Sidewall Height inches (mm) | 3.78 (96) | 4.25 (108) | 0.47 (12) 12.5% |
| Revolutions per mile (km) | 821.21 (510.27) | 790.78 (491.37) | -30.42 (-18.9) -3.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.77 mph (33.43 km/h) |
| 25 mph (40.23 km/h) | 25.96 mph (41.78 km/h) |
| 30 mph (48.28 km/h) | 31.15 mph (50.14 km/h) |
| 35 mph (56.33 km/h) | 36.35 mph (58.49 km/h) |
| 40 mph (64.37 km/h) | 41.54 mph (66.85 km/h) |
| 45 mph (72.42 km/h) | 46.73 mph (75.21 km/h) |
| 50 mph (80.47 km/h) | 51.92 mph (83.56 km/h) |
| 55 mph (88.51 km/h) | 57.12 mph (91.92 km/h) |
| 60 mph (96.56 km/h) | 62.31 mph (100.28 km/h) |
| 65 mph (104.61 km/h) | 67.5 mph (108.63 km/h) |
| 70 mph (112.65 km/h) | 72.69 mph (116.99 km/h) |
| 75 mph (120.7 km/h) | 77.89 mph (125.34 km/h) |
| 80 mph (128.75 km/h) | 83.08 mph (133.7 km/h) |
| 85 mph (136.79 km/h) | 88.27 mph (142.06 km/h) |
| 90 mph (144.84 km/h) | 93.46 mph (150.41 km/h) |
| 95 mph (152.89 km/h) | 98.66 mph (158.77 km/h) |
| 100 mph (160.93 km/h) | 103.85 mph (167.13 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
