Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/60-18 | 140/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.61 (625.2) | 26.82 (681.2) | 2.2 (56) 9% |
| Width inches (mm) | 5.51 (140) | 5.51 (140) | 0 (0) 0% |
| Circum. inches (mm) | 77.33 (1964.12) | 84.25 (2140.05) | 6.93 (175.93) 9% |
| Sidewall Height inches (mm) | 3.31 (84) | 4.41 (112) | 1.1 (28) 33.3% |
| Revolutions per mile (km) | 819.37 (509.13) | 752.01 (467.28) | -67.36 (-41.85) -8.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.79 mph (35.07 km/h) |
| 25 mph (40.23 km/h) | 27.24 mph (43.84 km/h) |
| 30 mph (48.28 km/h) | 32.69 mph (52.6 km/h) |
| 35 mph (56.33 km/h) | 38.13 mph (61.37 km/h) |
| 40 mph (64.37 km/h) | 43.58 mph (70.14 km/h) |
| 45 mph (72.42 km/h) | 49.03 mph (78.91 km/h) |
| 50 mph (80.47 km/h) | 54.48 mph (87.67 km/h) |
| 55 mph (88.51 km/h) | 59.93 mph (96.44 km/h) |
| 60 mph (96.56 km/h) | 65.37 mph (105.21 km/h) |
| 65 mph (104.61 km/h) | 70.82 mph (113.98 km/h) |
| 70 mph (112.65 km/h) | 76.27 mph (122.74 km/h) |
| 75 mph (120.7 km/h) | 81.72 mph (131.51 km/h) |
| 80 mph (128.75 km/h) | 87.17 mph (140.28 km/h) |
| 85 mph (136.79 km/h) | 92.61 mph (149.05 km/h) |
| 90 mph (144.84 km/h) | 98.06 mph (157.81 km/h) |
| 95 mph (152.89 km/h) | 103.51 mph (166.58 km/h) |
| 100 mph (160.93 km/h) | 108.96 mph (175.35 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
