Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/70-12 | 155/65-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.99 (507.8) | 19.93 (506.3) | -0.06 (-1.5) -0.3% |
| Width inches (mm) | 5.71 (145) | 6.1 (155) | 0.39 (10) 6.9% |
| Circum. inches (mm) | 62.81 (1595.3) | 62.62 (1590.59) | -0.19 (-4.71) -0.3% |
| Sidewall Height inches (mm) | 4 (101.5) | 3.97 (100.75) | -0.03 (-0.75) -0.7% |
| Revolutions per mile (km) | 1008.8 (626.84) | 1011.79 (628.7) | 2.99 (1.86) 0.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.94 mph (32.09 km/h) |
| 25 mph (40.23 km/h) | 24.93 mph (40.11 km/h) |
| 30 mph (48.28 km/h) | 29.91 mph (48.14 km/h) |
| 35 mph (56.33 km/h) | 34.9 mph (56.16 km/h) |
| 40 mph (64.37 km/h) | 39.88 mph (64.18 km/h) |
| 45 mph (72.42 km/h) | 44.87 mph (72.21 km/h) |
| 50 mph (80.47 km/h) | 49.85 mph (80.23 km/h) |
| 55 mph (88.51 km/h) | 54.84 mph (88.25 km/h) |
| 60 mph (96.56 km/h) | 59.82 mph (96.28 km/h) |
| 65 mph (104.61 km/h) | 64.81 mph (104.3 km/h) |
| 70 mph (112.65 km/h) | 69.79 mph (112.32 km/h) |
| 75 mph (120.7 km/h) | 74.78 mph (120.34 km/h) |
| 80 mph (128.75 km/h) | 79.76 mph (128.37 km/h) |
| 85 mph (136.79 km/h) | 84.75 mph (136.39 km/h) |
| 90 mph (144.84 km/h) | 89.73 mph (144.41 km/h) |
| 95 mph (152.89 km/h) | 94.72 mph (152.44 km/h) |
| 100 mph (160.93 km/h) | 99.7 mph (160.46 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
