Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-12 | 145/80-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.54 (521.8) | 22.13 (562.2) | 1.59 (40.4) 7.7% |
| Width inches (mm) | 6.1 (155) | 5.71 (145) | -0.39 (-10) -6.5% |
| Circum. inches (mm) | 64.54 (1639.28) | 69.54 (1766.2) | 5 (126.92) 7.7% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 4.57 (116) | 0.3 (7.5) 6.9% |
| Revolutions per mile (km) | 981.74 (610.02) | 911.19 (566.19) | -70.55 (-43.84) -7.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.55 mph (34.68 km/h) |
| 25 mph (40.23 km/h) | 26.94 mph (43.35 km/h) |
| 30 mph (48.28 km/h) | 32.32 mph (52.02 km/h) |
| 35 mph (56.33 km/h) | 37.71 mph (60.69 km/h) |
| 40 mph (64.37 km/h) | 43.1 mph (69.36 km/h) |
| 45 mph (72.42 km/h) | 48.48 mph (78.03 km/h) |
| 50 mph (80.47 km/h) | 53.87 mph (86.7 km/h) |
| 55 mph (88.51 km/h) | 59.26 mph (95.37 km/h) |
| 60 mph (96.56 km/h) | 64.65 mph (104.04 km/h) |
| 65 mph (104.61 km/h) | 70.03 mph (112.71 km/h) |
| 70 mph (112.65 km/h) | 75.42 mph (121.38 km/h) |
| 75 mph (120.7 km/h) | 80.81 mph (130.05 km/h) |
| 80 mph (128.75 km/h) | 86.19 mph (138.72 km/h) |
| 85 mph (136.79 km/h) | 91.58 mph (147.39 km/h) |
| 90 mph (144.84 km/h) | 96.97 mph (156.06 km/h) |
| 95 mph (152.89 km/h) | 102.36 mph (164.73 km/h) |
| 100 mph (160.93 km/h) | 107.74 mph (173.39 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2319 | 2694 | 2901 | 3029 | 3167 | 3266 | 3375 | 3503 | 3680 | 3858 | 4055 | 4213 | 4499 | 4815 | 5062 | 5220 | 5309 | 5634 | 6088 | 7075 |
Better Fuel Economy Factory Ratios Increased Power
