Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/65-14 | 180/45-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.42 (544.1) | 20.38 (517.6) | -1.04 (-26.5) -4.9% |
| Width inches (mm) | 5.71 (145) | 7.09 (180) | 1.38 (35) 24.1% |
| Circum. inches (mm) | 67.3 (1709.34) | 64.02 (1626.09) | -3.28 (-83.25) -4.9% |
| Sidewall Height inches (mm) | 3.71 (94.25) | 3.19 (81) | -0.52 (-13.25) -14.1% |
| Revolutions per mile (km) | 941.5 (585.02) | 989.7 (614.97) | 48.2 (29.95) 5.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.03 mph (30.62 km/h) |
| 25 mph (40.23 km/h) | 23.78 mph (38.27 km/h) |
| 30 mph (48.28 km/h) | 28.54 mph (45.93 km/h) |
| 35 mph (56.33 km/h) | 33.3 mph (53.58 km/h) |
| 40 mph (64.37 km/h) | 38.05 mph (61.24 km/h) |
| 45 mph (72.42 km/h) | 42.81 mph (68.89 km/h) |
| 50 mph (80.47 km/h) | 47.56 mph (76.55 km/h) |
| 55 mph (88.51 km/h) | 52.32 mph (84.2 km/h) |
| 60 mph (96.56 km/h) | 57.08 mph (91.86 km/h) |
| 65 mph (104.61 km/h) | 61.83 mph (99.51 km/h) |
| 70 mph (112.65 km/h) | 66.59 mph (107.17 km/h) |
| 75 mph (120.7 km/h) | 71.35 mph (114.82 km/h) |
| 80 mph (128.75 km/h) | 76.1 mph (122.48 km/h) |
| 85 mph (136.79 km/h) | 80.86 mph (130.13 km/h) |
| 90 mph (144.84 km/h) | 85.62 mph (137.79 km/h) |
| 95 mph (152.89 km/h) | 90.37 mph (145.44 km/h) |
| 100 mph (160.93 km/h) | 95.13 mph (153.1 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
