Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/80-17 | 140/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.82 (655.8) | 26.82 (681.2) | 1 (25.4) 3.9% |
| Width inches (mm) | 5.51 (140) | 5.51 (140) | 0 (0) 0% |
| Circum. inches (mm) | 81.11 (2060.26) | 84.25 (2140.05) | 3.14 (79.8) 3.9% |
| Sidewall Height inches (mm) | 4.41 (112) | 4.41 (112) | 0 (0) 0% |
| Revolutions per mile (km) | 781.14 (485.38) | 752.01 (467.28) | -29.13 (-18.1) -3.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.77 mph (33.43 km/h) |
| 25 mph (40.23 km/h) | 25.97 mph (41.79 km/h) |
| 30 mph (48.28 km/h) | 31.16 mph (50.15 km/h) |
| 35 mph (56.33 km/h) | 36.36 mph (58.51 km/h) |
| 40 mph (64.37 km/h) | 41.55 mph (66.87 km/h) |
| 45 mph (72.42 km/h) | 46.74 mph (75.23 km/h) |
| 50 mph (80.47 km/h) | 51.94 mph (83.58 km/h) |
| 55 mph (88.51 km/h) | 57.13 mph (91.94 km/h) |
| 60 mph (96.56 km/h) | 62.32 mph (100.3 km/h) |
| 65 mph (104.61 km/h) | 67.52 mph (108.66 km/h) |
| 70 mph (112.65 km/h) | 72.71 mph (117.02 km/h) |
| 75 mph (120.7 km/h) | 77.9 mph (125.38 km/h) |
| 80 mph (128.75 km/h) | 83.1 mph (133.73 km/h) |
| 85 mph (136.79 km/h) | 88.29 mph (142.09 km/h) |
| 90 mph (144.84 km/h) | 93.49 mph (150.45 km/h) |
| 95 mph (152.89 km/h) | 98.68 mph (158.81 km/h) |
| 100 mph (160.93 km/h) | 103.87 mph (167.17 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
