Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/80-14 | 180/40-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.34 (643.6) | 19.67 (499.6) | -5.67 (-144) -22.4% |
| Width inches (mm) | 7.09 (180) | 7.09 (180) | 0 (0) 0% |
| Circum. inches (mm) | 79.6 (2021.93) | 61.79 (1569.54) | -17.81 (-452.39) -22.4% |
| Sidewall Height inches (mm) | 5.67 (144) | 2.83 (72) | -2.83 (-72) -50% |
| Revolutions per mile (km) | 795.94 (494.58) | 1025.36 (637.13) | 229.42 (142.55) 28.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 15.53 mph (24.99 km/h) |
| 25 mph (40.23 km/h) | 19.41 mph (31.23 km/h) |
| 30 mph (48.28 km/h) | 23.29 mph (37.48 km/h) |
| 35 mph (56.33 km/h) | 27.17 mph (43.72 km/h) |
| 40 mph (64.37 km/h) | 31.05 mph (49.97 km/h) |
| 45 mph (72.42 km/h) | 34.93 mph (56.22 km/h) |
| 50 mph (80.47 km/h) | 38.81 mph (62.46 km/h) |
| 55 mph (88.51 km/h) | 42.69 mph (68.71 km/h) |
| 60 mph (96.56 km/h) | 46.58 mph (74.96 km/h) |
| 65 mph (104.61 km/h) | 50.46 mph (81.2 km/h) |
| 70 mph (112.65 km/h) | 54.34 mph (87.45 km/h) |
| 75 mph (120.7 km/h) | 58.22 mph (93.7 km/h) |
| 80 mph (128.75 km/h) | 62.1 mph (99.94 km/h) |
| 85 mph (136.79 km/h) | 65.98 mph (106.19 km/h) |
| 90 mph (144.84 km/h) | 69.86 mph (112.43 km/h) |
| 95 mph (152.89 km/h) | 73.74 mph (118.68 km/h) |
| 100 mph (160.93 km/h) | 77.63 mph (124.93 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
