Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-12 | 145/70-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.54 (521.8) | 19.99 (507.8) | -0.55 (-14) -2.7% |
| Width inches (mm) | 6.1 (155) | 5.71 (145) | -0.39 (-10) -6.5% |
| Circum. inches (mm) | 64.54 (1639.28) | 62.81 (1595.3) | -1.73 (-43.98) -2.7% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 4 (101.5) | -0.28 (-7) -6.5% |
| Revolutions per mile (km) | 981.74 (610.02) | 1008.8 (626.84) | 27.07 (16.82) 2.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.46 mph (31.32 km/h) |
| 25 mph (40.23 km/h) | 24.33 mph (39.15 km/h) |
| 30 mph (48.28 km/h) | 29.2 mph (46.99 km/h) |
| 35 mph (56.33 km/h) | 34.06 mph (54.82 km/h) |
| 40 mph (64.37 km/h) | 38.93 mph (62.65 km/h) |
| 45 mph (72.42 km/h) | 43.79 mph (70.48 km/h) |
| 50 mph (80.47 km/h) | 48.66 mph (78.31 km/h) |
| 55 mph (88.51 km/h) | 53.52 mph (86.14 km/h) |
| 60 mph (96.56 km/h) | 58.39 mph (93.97 km/h) |
| 65 mph (104.61 km/h) | 63.26 mph (101.8 km/h) |
| 70 mph (112.65 km/h) | 68.12 mph (109.63 km/h) |
| 75 mph (120.7 km/h) | 72.99 mph (117.46 km/h) |
| 80 mph (128.75 km/h) | 77.85 mph (125.29 km/h) |
| 85 mph (136.79 km/h) | 82.72 mph (133.12 km/h) |
| 90 mph (144.84 km/h) | 87.59 mph (140.96 km/h) |
| 95 mph (152.89 km/h) | 92.45 mph (148.79 km/h) |
| 100 mph (160.93 km/h) | 97.32 mph (156.62 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
