Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/90-12 | 120/90-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.5 (520.8) | 22.5 (571.6) | 2 (50.8) 9.8% |
| Width inches (mm) | 4.72 (120) | 4.72 (120) | 0 (0) 0% |
| Circum. inches (mm) | 64.42 (1636.14) | 70.7 (1795.73) | 6.28 (159.59) 9.8% |
| Sidewall Height inches (mm) | 4.25 (108) | 4.25 (108) | 0 (0) 0% |
| Revolutions per mile (km) | 983.62 (611.19) | 896.2 (556.87) | -87.42 (-54.32) -8.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.95 mph (35.33 km/h) |
| 25 mph (40.23 km/h) | 27.44 mph (44.16 km/h) |
| 30 mph (48.28 km/h) | 32.93 mph (52.99 km/h) |
| 35 mph (56.33 km/h) | 38.41 mph (61.82 km/h) |
| 40 mph (64.37 km/h) | 43.9 mph (70.65 km/h) |
| 45 mph (72.42 km/h) | 49.39 mph (79.48 km/h) |
| 50 mph (80.47 km/h) | 54.88 mph (88.32 km/h) |
| 55 mph (88.51 km/h) | 60.36 mph (97.15 km/h) |
| 60 mph (96.56 km/h) | 65.85 mph (105.98 km/h) |
| 65 mph (104.61 km/h) | 71.34 mph (114.81 km/h) |
| 70 mph (112.65 km/h) | 76.83 mph (123.64 km/h) |
| 75 mph (120.7 km/h) | 82.32 mph (132.47 km/h) |
| 80 mph (128.75 km/h) | 87.8 mph (141.31 km/h) |
| 85 mph (136.79 km/h) | 93.29 mph (150.14 km/h) |
| 90 mph (144.84 km/h) | 98.78 mph (158.97 km/h) |
| 95 mph (152.89 km/h) | 104.27 mph (167.8 km/h) |
| 100 mph (160.93 km/h) | 109.75 mph (176.63 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2281 | 2649 | 2853 | 2979 | 3115 | 3212 | 3319 | 3445 | 3620 | 3795 | 3989 | 4144 | 4425 | 4736 | 4979 | 5134 | 5221 | 5542 | 5988 | 6958 |
Better Fuel Economy Factory Ratios Increased Power
