Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/90-12 | 140/70-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.5 (520.8) | 19.72 (500.8) | -0.79 (-20) -3.8% |
| Width inches (mm) | 4.72 (120) | 5.51 (140) | 0.79 (20) 16.7% |
| Circum. inches (mm) | 64.42 (1636.14) | 61.94 (1573.31) | -2.47 (-62.83) -3.8% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.86 (98) | -0.39 (-10) -9.3% |
| Revolutions per mile (km) | 983.62 (611.19) | 1022.9 (635.6) | 39.28 (24.41) 4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.23 mph (30.95 km/h) |
| 25 mph (40.23 km/h) | 24.04 mph (38.69 km/h) |
| 30 mph (48.28 km/h) | 28.85 mph (46.43 km/h) |
| 35 mph (56.33 km/h) | 33.66 mph (54.16 km/h) |
| 40 mph (64.37 km/h) | 38.46 mph (61.9 km/h) |
| 45 mph (72.42 km/h) | 43.27 mph (69.64 km/h) |
| 50 mph (80.47 km/h) | 48.08 mph (77.38 km/h) |
| 55 mph (88.51 km/h) | 52.89 mph (85.11 km/h) |
| 60 mph (96.56 km/h) | 57.7 mph (92.85 km/h) |
| 65 mph (104.61 km/h) | 62.5 mph (100.59 km/h) |
| 70 mph (112.65 km/h) | 67.31 mph (108.33 km/h) |
| 75 mph (120.7 km/h) | 72.12 mph (116.07 km/h) |
| 80 mph (128.75 km/h) | 76.93 mph (123.8 km/h) |
| 85 mph (136.79 km/h) | 81.74 mph (131.54 km/h) |
| 90 mph (144.84 km/h) | 86.54 mph (139.28 km/h) |
| 95 mph (152.89 km/h) | 91.35 mph (147.02 km/h) |
| 100 mph (160.93 km/h) | 96.16 mph (154.75 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
