Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/60-18 | 155/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.61 (625.2) | 24.71 (627.7) | 0.1 (2.5) 0.4% |
| Width inches (mm) | 5.51 (140) | 6.1 (155) | 0.59 (15) 10.7% |
| Circum. inches (mm) | 77.33 (1964.12) | 77.64 (1971.98) | 0.31 (7.85) 0.4% |
| Sidewall Height inches (mm) | 3.31 (84) | 3.36 (85.25) | 0.05 (1.25) 1.5% |
| Revolutions per mile (km) | 819.37 (509.13) | 816.11 (507.1) | -3.26 (-2.03) -0.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.08 mph (32.32 km/h) |
| 25 mph (40.23 km/h) | 25.1 mph (40.39 km/h) |
| 30 mph (48.28 km/h) | 30.12 mph (48.47 km/h) |
| 35 mph (56.33 km/h) | 35.14 mph (56.55 km/h) |
| 40 mph (64.37 km/h) | 40.16 mph (64.63 km/h) |
| 45 mph (72.42 km/h) | 45.18 mph (72.71 km/h) |
| 50 mph (80.47 km/h) | 50.2 mph (80.79 km/h) |
| 55 mph (88.51 km/h) | 55.22 mph (88.87 km/h) |
| 60 mph (96.56 km/h) | 60.24 mph (96.95 km/h) |
| 65 mph (104.61 km/h) | 65.26 mph (105.03 km/h) |
| 70 mph (112.65 km/h) | 70.28 mph (113.1 km/h) |
| 75 mph (120.7 km/h) | 75.3 mph (121.18 km/h) |
| 80 mph (128.75 km/h) | 80.32 mph (129.26 km/h) |
| 85 mph (136.79 km/h) | 85.34 mph (137.34 km/h) |
| 90 mph (144.84 km/h) | 90.36 mph (145.42 km/h) |
| 95 mph (152.89 km/h) | 95.38 mph (153.5 km/h) |
| 100 mph (160.93 km/h) | 100.4 mph (161.58 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2077 | 2413 | 2598 | 2713 | 2837 | 2925 | 3022 | 3137 | 3296 | 3456 | 3632 | 3774 | 4030 | 4313 | 4534 | 4675 | 4755 | 5046 | 5453 | 6337 |
Better Fuel Economy Factory Ratios Increased Power
