Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/70-12 | 145/70-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.99 (507.8) | 20.99 (533.2) | 1 (25.4) 5% |
| Width inches (mm) | 5.71 (145) | 5.71 (145) | 0 (0) 0% |
| Circum. inches (mm) | 62.81 (1595.3) | 65.95 (1675.1) | 3.14 (79.8) 5% |
| Sidewall Height inches (mm) | 4 (101.5) | 4 (101.5) | 0 (0) 0% |
| Revolutions per mile (km) | 1008.8 (626.84) | 960.75 (596.98) | -48.06 (-29.86) -4.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21 mph (33.8 km/h) |
| 25 mph (40.23 km/h) | 26.25 mph (42.25 km/h) |
| 30 mph (48.28 km/h) | 31.5 mph (50.7 km/h) |
| 35 mph (56.33 km/h) | 36.75 mph (59.14 km/h) |
| 40 mph (64.37 km/h) | 42 mph (67.59 km/h) |
| 45 mph (72.42 km/h) | 47.25 mph (76.04 km/h) |
| 50 mph (80.47 km/h) | 52.5 mph (84.49 km/h) |
| 55 mph (88.51 km/h) | 57.75 mph (92.94 km/h) |
| 60 mph (96.56 km/h) | 63 mph (101.39 km/h) |
| 65 mph (104.61 km/h) | 68.25 mph (109.84 km/h) |
| 70 mph (112.65 km/h) | 73.5 mph (118.29 km/h) |
| 75 mph (120.7 km/h) | 78.75 mph (126.74 km/h) |
| 80 mph (128.75 km/h) | 84 mph (135.19 km/h) |
| 85 mph (136.79 km/h) | 89.25 mph (143.64 km/h) |
| 90 mph (144.84 km/h) | 94.5 mph (152.09 km/h) |
| 95 mph (152.89 km/h) | 99.75 mph (160.54 km/h) |
| 100 mph (160.93 km/h) | 105 mph (168.98 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
