Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/60-18 | 140/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.61 (625.2) | 23.51 (597.2) | -1.1 (-28) -4.5% |
| Width inches (mm) | 5.51 (140) | 5.51 (140) | 0 (0) 0% |
| Circum. inches (mm) | 77.33 (1964.12) | 73.86 (1876.16) | -3.46 (-87.96) -4.5% |
| Sidewall Height inches (mm) | 3.31 (84) | 2.76 (70) | -0.55 (-14) -16.7% |
| Revolutions per mile (km) | 819.37 (509.13) | 857.79 (533) | 38.42 (23.87) 4.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.1 mph (30.75 km/h) |
| 25 mph (40.23 km/h) | 23.88 mph (38.43 km/h) |
| 30 mph (48.28 km/h) | 28.66 mph (46.12 km/h) |
| 35 mph (56.33 km/h) | 33.43 mph (53.8 km/h) |
| 40 mph (64.37 km/h) | 38.21 mph (61.49 km/h) |
| 45 mph (72.42 km/h) | 42.98 mph (69.18 km/h) |
| 50 mph (80.47 km/h) | 47.76 mph (76.86 km/h) |
| 55 mph (88.51 km/h) | 52.54 mph (84.55 km/h) |
| 60 mph (96.56 km/h) | 57.31 mph (92.24 km/h) |
| 65 mph (104.61 km/h) | 62.09 mph (99.92 km/h) |
| 70 mph (112.65 km/h) | 66.87 mph (107.61 km/h) |
| 75 mph (120.7 km/h) | 71.64 mph (115.3 km/h) |
| 80 mph (128.75 km/h) | 76.42 mph (122.98 km/h) |
| 85 mph (136.79 km/h) | 81.19 mph (130.67 km/h) |
| 90 mph (144.84 km/h) | 85.97 mph (138.35 km/h) |
| 95 mph (152.89 km/h) | 90.75 mph (146.04 km/h) |
| 100 mph (160.93 km/h) | 95.52 mph (153.73 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2183 | 2536 | 2731 | 2852 | 2982 | 3075 | 3177 | 3298 | 3465 | 3632 | 3818 | 3966 | 4236 | 4533 | 4765 | 4914 | 4997 | 5304 | 5731 | 6660 |
Better Fuel Economy Factory Ratios Increased Power
