Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/60-18 | 190/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.61 (625.2) | 25.48 (647.2) | 0.87 (22) 3.5% |
| Width inches (mm) | 5.51 (140) | 7.48 (190) | 1.97 (50) 35.7% |
| Circum. inches (mm) | 77.33 (1964.12) | 80.05 (2033.24) | 2.72 (69.12) 3.5% |
| Sidewall Height inches (mm) | 3.31 (84) | 3.74 (95) | 0.43 (11) 13.1% |
| Revolutions per mile (km) | 819.37 (509.13) | 791.52 (491.83) | -27.85 (-17.31) -3.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.7 mph (33.32 km/h) |
| 25 mph (40.23 km/h) | 25.88 mph (41.65 km/h) |
| 30 mph (48.28 km/h) | 31.06 mph (49.98 km/h) |
| 35 mph (56.33 km/h) | 36.23 mph (58.31 km/h) |
| 40 mph (64.37 km/h) | 41.41 mph (66.64 km/h) |
| 45 mph (72.42 km/h) | 46.58 mph (74.97 km/h) |
| 50 mph (80.47 km/h) | 51.76 mph (83.3 km/h) |
| 55 mph (88.51 km/h) | 56.94 mph (91.63 km/h) |
| 60 mph (96.56 km/h) | 62.11 mph (99.96 km/h) |
| 65 mph (104.61 km/h) | 67.29 mph (108.29 km/h) |
| 70 mph (112.65 km/h) | 72.46 mph (116.62 km/h) |
| 75 mph (120.7 km/h) | 77.64 mph (124.95 km/h) |
| 80 mph (128.75 km/h) | 82.82 mph (133.28 km/h) |
| 85 mph (136.79 km/h) | 87.99 mph (141.61 km/h) |
| 90 mph (144.84 km/h) | 93.17 mph (149.94 km/h) |
| 95 mph (152.89 km/h) | 98.34 mph (158.27 km/h) |
| 100 mph (160.93 km/h) | 103.52 mph (166.6 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2014 | 2340 | 2520 | 2631 | 2751 | 2837 | 2931 | 3043 | 3197 | 3351 | 3523 | 3660 | 3909 | 4183 | 4397 | 4534 | 4611 | 4894 | 5289 | 6146 |
Better Fuel Economy Factory Ratios Increased Power
