Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/60-18 | 145/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.61 (625.2) | 25.42 (645.7) | 0.81 (20.5) 3.3% |
| Width inches (mm) | 5.51 (140) | 5.71 (145) | 0.2 (5) 3.6% |
| Circum. inches (mm) | 77.33 (1964.12) | 79.86 (2028.53) | 2.54 (64.4) 3.3% |
| Sidewall Height inches (mm) | 3.31 (84) | 3.71 (94.25) | 0.4 (10.25) 12.2% |
| Revolutions per mile (km) | 819.37 (509.13) | 793.36 (492.97) | -26.01 (-16.16) -3.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.66 mph (33.24 km/h) |
| 25 mph (40.23 km/h) | 25.82 mph (41.55 km/h) |
| 30 mph (48.28 km/h) | 30.98 mph (49.86 km/h) |
| 35 mph (56.33 km/h) | 36.15 mph (58.17 km/h) |
| 40 mph (64.37 km/h) | 41.31 mph (66.48 km/h) |
| 45 mph (72.42 km/h) | 46.48 mph (74.8 km/h) |
| 50 mph (80.47 km/h) | 51.64 mph (83.11 km/h) |
| 55 mph (88.51 km/h) | 56.8 mph (91.42 km/h) |
| 60 mph (96.56 km/h) | 61.97 mph (99.73 km/h) |
| 65 mph (104.61 km/h) | 67.13 mph (108.04 km/h) |
| 70 mph (112.65 km/h) | 72.3 mph (116.35 km/h) |
| 75 mph (120.7 km/h) | 77.46 mph (124.66 km/h) |
| 80 mph (128.75 km/h) | 82.62 mph (132.97 km/h) |
| 85 mph (136.79 km/h) | 87.79 mph (141.28 km/h) |
| 90 mph (144.84 km/h) | 92.95 mph (149.59 km/h) |
| 95 mph (152.89 km/h) | 98.12 mph (157.9 km/h) |
| 100 mph (160.93 km/h) | 103.28 mph (166.21 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2019 | 2345 | 2526 | 2638 | 2758 | 2844 | 2938 | 3050 | 3205 | 3359 | 3531 | 3668 | 3918 | 4193 | 4407 | 4545 | 4622 | 4906 | 5301 | 6160 |
Better Fuel Economy Factory Ratios Increased Power
