Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/70-15 | 140/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.61 (549) | 24.72 (627.8) | 3.1 (78.8) 14.4% |
| Width inches (mm) | 4.72 (120) | 5.51 (140) | 0.79 (20) 16.7% |
| Circum. inches (mm) | 67.9 (1724.73) | 77.65 (1972.29) | 9.75 (247.56) 14.4% |
| Sidewall Height inches (mm) | 3.31 (84) | 3.86 (98) | 0.55 (14) 16.7% |
| Revolutions per mile (km) | 933.1 (579.8) | 815.98 (507.02) | -117.12 (-72.77) -12.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.87 mph (36.81 km/h) |
| 25 mph (40.23 km/h) | 28.59 mph (46.01 km/h) |
| 30 mph (48.28 km/h) | 34.31 mph (55.21 km/h) |
| 35 mph (56.33 km/h) | 40.02 mph (64.41 km/h) |
| 40 mph (64.37 km/h) | 45.74 mph (73.61 km/h) |
| 45 mph (72.42 km/h) | 51.46 mph (82.82 km/h) |
| 50 mph (80.47 km/h) | 57.18 mph (92.02 km/h) |
| 55 mph (88.51 km/h) | 62.89 mph (101.22 km/h) |
| 60 mph (96.56 km/h) | 68.61 mph (110.42 km/h) |
| 65 mph (104.61 km/h) | 74.33 mph (119.62 km/h) |
| 70 mph (112.65 km/h) | 80.05 mph (128.82 km/h) |
| 75 mph (120.7 km/h) | 85.77 mph (138.03 km/h) |
| 80 mph (128.75 km/h) | 91.48 mph (147.23 km/h) |
| 85 mph (136.79 km/h) | 97.2 mph (156.43 km/h) |
| 90 mph (144.84 km/h) | 102.92 mph (165.63 km/h) |
| 95 mph (152.89 km/h) | 108.64 mph (174.83 km/h) |
| 100 mph (160.93 km/h) | 114.35 mph (184.03 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2077 | 2412 | 2598 | 2713 | 2836 | 2925 | 3022 | 3137 | 3296 | 3455 | 3632 | 3773 | 4029 | 4312 | 4533 | 4674 | 4754 | 5045 | 5452 | 6336 |
Better Fuel Economy Factory Ratios Increased Power
