Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/80-14 | 140/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.34 (643.6) | 26.82 (681.2) | 1.48 (37.6) 5.8% |
| Width inches (mm) | 7.09 (180) | 5.51 (140) | -1.57 (-40) -22.2% |
| Circum. inches (mm) | 79.6 (2021.93) | 84.25 (2140.05) | 4.65 (118.12) 5.8% |
| Sidewall Height inches (mm) | 5.67 (144) | 4.41 (112) | -1.26 (-32) -22.2% |
| Revolutions per mile (km) | 795.94 (494.58) | 752.01 (467.28) | -43.93 (-27.3) -5.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.17 mph (34.07 km/h) |
| 25 mph (40.23 km/h) | 26.46 mph (42.58 km/h) |
| 30 mph (48.28 km/h) | 31.75 mph (51.1 km/h) |
| 35 mph (56.33 km/h) | 37.04 mph (59.62 km/h) |
| 40 mph (64.37 km/h) | 42.34 mph (68.13 km/h) |
| 45 mph (72.42 km/h) | 47.63 mph (76.65 km/h) |
| 50 mph (80.47 km/h) | 52.92 mph (85.17 km/h) |
| 55 mph (88.51 km/h) | 58.21 mph (93.69 km/h) |
| 60 mph (96.56 km/h) | 63.51 mph (102.2 km/h) |
| 65 mph (104.61 km/h) | 68.8 mph (110.72 km/h) |
| 70 mph (112.65 km/h) | 74.09 mph (119.24 km/h) |
| 75 mph (120.7 km/h) | 79.38 mph (127.75 km/h) |
| 80 mph (128.75 km/h) | 84.67 mph (136.27 km/h) |
| 85 mph (136.79 km/h) | 89.97 mph (144.79 km/h) |
| 90 mph (144.84 km/h) | 95.26 mph (153.3 km/h) |
| 95 mph (152.89 km/h) | 100.55 mph (161.82 km/h) |
| 100 mph (160.93 km/h) | 105.84 mph (170.34 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1914 | 2223 | 2394 | 2500 | 2614 | 2696 | 2785 | 2891 | 3038 | 3184 | 3347 | 3477 | 3713 | 3974 | 4178 | 4308 | 4381 | 4650 | 5025 | 5839 |
Better Fuel Economy Factory Ratios Increased Power
