Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/70-12 | 145/80-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.99 (507.8) | 22.13 (562.2) | 2.14 (54.4) 10.7% |
| Width inches (mm) | 5.71 (145) | 5.71 (145) | 0 (0) 0% |
| Circum. inches (mm) | 62.81 (1595.3) | 69.54 (1766.2) | 6.73 (170.9) 10.7% |
| Sidewall Height inches (mm) | 4 (101.5) | 4.57 (116) | 0.57 (14.5) 14.3% |
| Revolutions per mile (km) | 1008.8 (626.84) | 911.19 (566.19) | -97.61 (-60.65) -9.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.14 mph (35.64 km/h) |
| 25 mph (40.23 km/h) | 27.68 mph (44.54 km/h) |
| 30 mph (48.28 km/h) | 33.21 mph (53.45 km/h) |
| 35 mph (56.33 km/h) | 38.75 mph (62.36 km/h) |
| 40 mph (64.37 km/h) | 44.29 mph (71.27 km/h) |
| 45 mph (72.42 km/h) | 49.82 mph (80.18 km/h) |
| 50 mph (80.47 km/h) | 55.36 mph (89.09 km/h) |
| 55 mph (88.51 km/h) | 60.89 mph (98 km/h) |
| 60 mph (96.56 km/h) | 66.43 mph (106.91 km/h) |
| 65 mph (104.61 km/h) | 71.96 mph (115.81 km/h) |
| 70 mph (112.65 km/h) | 77.5 mph (124.72 km/h) |
| 75 mph (120.7 km/h) | 83.03 mph (133.63 km/h) |
| 80 mph (128.75 km/h) | 88.57 mph (142.54 km/h) |
| 85 mph (136.79 km/h) | 94.11 mph (151.45 km/h) |
| 90 mph (144.84 km/h) | 99.64 mph (160.36 km/h) |
| 95 mph (152.89 km/h) | 105.18 mph (169.27 km/h) |
| 100 mph (160.93 km/h) | 110.71 mph (178.18 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
