Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/70-15 | 285/70-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.61 (549) | 29.71 (754.6) | 8.09 (205.6) 37.4% |
| Width inches (mm) | 4.72 (120) | 11.22 (285) | 6.5 (165) 137.5% |
| Circum. inches (mm) | 67.9 (1724.73) | 93.33 (2370.65) | 25.43 (645.91) 37.4% |
| Sidewall Height inches (mm) | 3.31 (84) | 7.85 (199.5) | 4.55 (115.5) 137.5% |
| Revolutions per mile (km) | 933.1 (579.8) | 678.86 (421.83) | -254.23 (-157.97) -27.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.49 mph (44.24 km/h) |
| 25 mph (40.23 km/h) | 34.36 mph (55.3 km/h) |
| 30 mph (48.28 km/h) | 41.23 mph (66.36 km/h) |
| 35 mph (56.33 km/h) | 48.11 mph (77.42 km/h) |
| 40 mph (64.37 km/h) | 54.98 mph (88.48 km/h) |
| 45 mph (72.42 km/h) | 61.85 mph (99.54 km/h) |
| 50 mph (80.47 km/h) | 68.72 mph (110.6 km/h) |
| 55 mph (88.51 km/h) | 75.6 mph (121.66 km/h) |
| 60 mph (96.56 km/h) | 82.47 mph (132.72 km/h) |
| 65 mph (104.61 km/h) | 89.34 mph (143.78 km/h) |
| 70 mph (112.65 km/h) | 96.21 mph (154.84 km/h) |
| 75 mph (120.7 km/h) | 103.09 mph (165.9 km/h) |
| 80 mph (128.75 km/h) | 109.96 mph (176.96 km/h) |
| 85 mph (136.79 km/h) | 116.83 mph (188.02 km/h) |
| 90 mph (144.84 km/h) | 123.7 mph (199.08 km/h) |
| 95 mph (152.89 km/h) | 130.58 mph (210.14 km/h) |
| 100 mph (160.93 km/h) | 137.45 mph (221.2 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1728 | 2007 | 2161 | 2257 | 2360 | 2433 | 2514 | 2610 | 2742 | 2874 | 3021 | 3139 | 3352 | 3587 | 3771 | 3889 | 3955 | 4198 | 4536 | 5271 |
Better Fuel Economy Factory Ratios Increased Power
