Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/70-17 | 120/90-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.61 (599.8) | 25.5 (647.8) | 1.89 (48) 8% |
| Width inches (mm) | 4.72 (120) | 4.72 (120) | 0 (0) 0% |
| Circum. inches (mm) | 74.19 (1884.33) | 80.12 (2035.12) | 5.94 (150.8) 8% |
| Sidewall Height inches (mm) | 3.31 (84) | 4.25 (108) | 0.94 (24) 28.6% |
| Revolutions per mile (km) | 854.07 (530.69) | 790.78 (491.37) | -63.28 (-39.32) -7.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.6 mph (34.76 km/h) |
| 25 mph (40.23 km/h) | 27 mph (43.45 km/h) |
| 30 mph (48.28 km/h) | 32.4 mph (52.14 km/h) |
| 35 mph (56.33 km/h) | 37.8 mph (60.83 km/h) |
| 40 mph (64.37 km/h) | 43.2 mph (69.53 km/h) |
| 45 mph (72.42 km/h) | 48.6 mph (78.22 km/h) |
| 50 mph (80.47 km/h) | 54 mph (86.91 km/h) |
| 55 mph (88.51 km/h) | 59.4 mph (95.6 km/h) |
| 60 mph (96.56 km/h) | 64.8 mph (104.29 km/h) |
| 65 mph (104.61 km/h) | 70.2 mph (112.98 km/h) |
| 70 mph (112.65 km/h) | 75.6 mph (121.67 km/h) |
| 75 mph (120.7 km/h) | 81 mph (130.36 km/h) |
| 80 mph (128.75 km/h) | 86.4 mph (139.05 km/h) |
| 85 mph (136.79 km/h) | 91.8 mph (147.74 km/h) |
| 90 mph (144.84 km/h) | 97.2 mph (156.43 km/h) |
| 95 mph (152.89 km/h) | 102.6 mph (165.12 km/h) |
| 100 mph (160.93 km/h) | 108 mph (173.81 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
