Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/70-18 | 140/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.72 (653.2) | 26.82 (681.2) | 1.1 (28) 4.3% |
| Width inches (mm) | 5.51 (140) | 5.51 (140) | 0 (0) 0% |
| Circum. inches (mm) | 80.79 (2052.09) | 84.25 (2140.05) | 3.46 (87.96) 4.3% |
| Sidewall Height inches (mm) | 3.86 (98) | 4.41 (112) | 0.55 (14) 14.3% |
| Revolutions per mile (km) | 784.25 (487.31) | 752.01 (467.28) | -32.24 (-20.03) -4.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.86 mph (33.57 km/h) |
| 25 mph (40.23 km/h) | 26.07 mph (41.96 km/h) |
| 30 mph (48.28 km/h) | 31.29 mph (50.35 km/h) |
| 35 mph (56.33 km/h) | 36.5 mph (58.74 km/h) |
| 40 mph (64.37 km/h) | 41.71 mph (67.13 km/h) |
| 45 mph (72.42 km/h) | 46.93 mph (75.52 km/h) |
| 50 mph (80.47 km/h) | 52.14 mph (83.92 km/h) |
| 55 mph (88.51 km/h) | 57.36 mph (92.31 km/h) |
| 60 mph (96.56 km/h) | 62.57 mph (100.7 km/h) |
| 65 mph (104.61 km/h) | 67.79 mph (109.09 km/h) |
| 70 mph (112.65 km/h) | 73 mph (117.48 km/h) |
| 75 mph (120.7 km/h) | 78.21 mph (125.87 km/h) |
| 80 mph (128.75 km/h) | 83.43 mph (134.27 km/h) |
| 85 mph (136.79 km/h) | 88.64 mph (142.66 km/h) |
| 90 mph (144.84 km/h) | 93.86 mph (151.05 km/h) |
| 95 mph (152.89 km/h) | 99.07 mph (159.44 km/h) |
| 100 mph (160.93 km/h) | 104.29 mph (167.83 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
