Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 240/50-16 | 180/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.45 (646.4) | 25.8 (655.2) | 0.35 (8.8) 1.4% |
| Width inches (mm) | 9.45 (240) | 7.09 (180) | -2.36 (-60) -25% |
| Circum. inches (mm) | 79.95 (2030.73) | 81.04 (2058.37) | 1.09 (27.65) 1.4% |
| Sidewall Height inches (mm) | 4.72 (120) | 3.9 (99) | -0.83 (-21) -17.5% |
| Revolutions per mile (km) | 792.5 (492.43) | 781.85 (485.82) | -10.64 (-6.61) -1.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.27 mph (32.63 km/h) |
| 25 mph (40.23 km/h) | 25.34 mph (40.78 km/h) |
| 30 mph (48.28 km/h) | 30.41 mph (48.94 km/h) |
| 35 mph (56.33 km/h) | 35.48 mph (57.09 km/h) |
| 40 mph (64.37 km/h) | 40.54 mph (65.25 km/h) |
| 45 mph (72.42 km/h) | 45.61 mph (73.41 km/h) |
| 50 mph (80.47 km/h) | 50.68 mph (81.56 km/h) |
| 55 mph (88.51 km/h) | 55.75 mph (89.72 km/h) |
| 60 mph (96.56 km/h) | 60.82 mph (97.88 km/h) |
| 65 mph (104.61 km/h) | 65.88 mph (106.03 km/h) |
| 70 mph (112.65 km/h) | 70.95 mph (114.19 km/h) |
| 75 mph (120.7 km/h) | 76.02 mph (122.34 km/h) |
| 80 mph (128.75 km/h) | 81.09 mph (130.5 km/h) |
| 85 mph (136.79 km/h) | 86.16 mph (138.66 km/h) |
| 90 mph (144.84 km/h) | 91.23 mph (146.81 km/h) |
| 95 mph (152.89 km/h) | 96.29 mph (154.97 km/h) |
| 100 mph (160.93 km/h) | 101.36 mph (163.13 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1990 | 2311 | 2489 | 2599 | 2718 | 2802 | 2896 | 3006 | 3158 | 3310 | 3480 | 3615 | 3861 | 4132 | 4343 | 4479 | 4555 | 4834 | 5224 | 6071 |
Better Fuel Economy Factory Ratios Increased Power
