Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/65-14 | 145/40-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.42 (544.1) | 18.57 (471.6) | -2.85 (-72.5) -13.3% |
| Width inches (mm) | 5.71 (145) | 5.71 (145) | 0 (0) 0% |
| Circum. inches (mm) | 67.3 (1709.34) | 58.33 (1481.58) | -8.97 (-227.77) -13.3% |
| Sidewall Height inches (mm) | 3.71 (94.25) | 2.28 (58) | -1.43 (-36.25) -38.5% |
| Revolutions per mile (km) | 941.5 (585.02) | 1086.24 (674.96) | 144.74 (89.94) 15.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.34 mph (27.9 km/h) |
| 25 mph (40.23 km/h) | 21.67 mph (34.87 km/h) |
| 30 mph (48.28 km/h) | 26 mph (41.85 km/h) |
| 35 mph (56.33 km/h) | 30.34 mph (48.82 km/h) |
| 40 mph (64.37 km/h) | 34.67 mph (55.8 km/h) |
| 45 mph (72.42 km/h) | 39 mph (62.77 km/h) |
| 50 mph (80.47 km/h) | 43.34 mph (69.75 km/h) |
| 55 mph (88.51 km/h) | 47.67 mph (76.72 km/h) |
| 60 mph (96.56 km/h) | 52.01 mph (83.69 km/h) |
| 65 mph (104.61 km/h) | 56.34 mph (90.67 km/h) |
| 70 mph (112.65 km/h) | 60.67 mph (97.64 km/h) |
| 75 mph (120.7 km/h) | 65.01 mph (104.62 km/h) |
| 80 mph (128.75 km/h) | 69.34 mph (111.59 km/h) |
| 85 mph (136.79 km/h) | 73.67 mph (118.57 km/h) |
| 90 mph (144.84 km/h) | 78.01 mph (125.54 km/h) |
| 95 mph (152.89 km/h) | 82.34 mph (132.52 km/h) |
| 100 mph (160.93 km/h) | 86.68 mph (139.49 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
