Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/80-14 | 180/66.5-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.34 (643.6) | 23.5 (596.8) | -1.84 (-46.8) -7.3% |
| Width inches (mm) | 7.09 (180) | 7.09 (180) | 0 (0) 0% |
| Circum. inches (mm) | 79.6 (2021.93) | 73.82 (1874.9) | -5.79 (-147.03) -7.3% |
| Sidewall Height inches (mm) | 5.67 (144) | 4.75 (120.6) | -0.92 (-23.4) -16.3% |
| Revolutions per mile (km) | 795.94 (494.58) | 858.36 (533.36) | 62.42 (38.78) 7.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.55 mph (29.85 km/h) |
| 25 mph (40.23 km/h) | 23.18 mph (37.31 km/h) |
| 30 mph (48.28 km/h) | 27.82 mph (44.77 km/h) |
| 35 mph (56.33 km/h) | 32.45 mph (52.23 km/h) |
| 40 mph (64.37 km/h) | 37.09 mph (59.69 km/h) |
| 45 mph (72.42 km/h) | 41.73 mph (67.15 km/h) |
| 50 mph (80.47 km/h) | 46.36 mph (74.62 km/h) |
| 55 mph (88.51 km/h) | 51 mph (82.08 km/h) |
| 60 mph (96.56 km/h) | 55.64 mph (89.54 km/h) |
| 65 mph (104.61 km/h) | 60.27 mph (97 km/h) |
| 70 mph (112.65 km/h) | 64.91 mph (104.46 km/h) |
| 75 mph (120.7 km/h) | 69.55 mph (111.92 km/h) |
| 80 mph (128.75 km/h) | 74.18 mph (119.39 km/h) |
| 85 mph (136.79 km/h) | 78.82 mph (126.85 km/h) |
| 90 mph (144.84 km/h) | 83.46 mph (134.31 km/h) |
| 95 mph (152.89 km/h) | 88.09 mph (141.77 km/h) |
| 100 mph (160.93 km/h) | 92.73 mph (149.23 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2184 | 2538 | 2733 | 2854 | 2984 | 3077 | 3179 | 3300 | 3467 | 3634 | 3820 | 3969 | 4239 | 4536 | 4768 | 4917 | 5001 | 5308 | 5735 | 6665 |
Better Fuel Economy Factory Ratios Increased Power
