Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/55-18 | 180/65-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.8 (655.2) | 25.21 (640.4) | -0.58 (-14.8) -2.3% |
| Width inches (mm) | 7.09 (180) | 7.09 (180) | 0 (0) 0% |
| Circum. inches (mm) | 81.04 (2058.37) | 79.21 (2011.88) | -1.83 (-46.5) -2.3% |
| Sidewall Height inches (mm) | 3.9 (99) | 4.61 (117) | 0.71 (18) 18.2% |
| Revolutions per mile (km) | 781.85 (485.82) | 799.92 (497.05) | 18.07 (11.23) 2.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.55 mph (31.46 km/h) |
| 25 mph (40.23 km/h) | 24.44 mph (39.32 km/h) |
| 30 mph (48.28 km/h) | 29.32 mph (47.19 km/h) |
| 35 mph (56.33 km/h) | 34.21 mph (55.05 km/h) |
| 40 mph (64.37 km/h) | 39.1 mph (62.92 km/h) |
| 45 mph (72.42 km/h) | 43.98 mph (70.78 km/h) |
| 50 mph (80.47 km/h) | 48.87 mph (78.65 km/h) |
| 55 mph (88.51 km/h) | 53.76 mph (86.51 km/h) |
| 60 mph (96.56 km/h) | 58.64 mph (94.38 km/h) |
| 65 mph (104.61 km/h) | 63.53 mph (102.24 km/h) |
| 70 mph (112.65 km/h) | 68.42 mph (110.11 km/h) |
| 75 mph (120.7 km/h) | 73.31 mph (117.97 km/h) |
| 80 mph (128.75 km/h) | 78.19 mph (125.84 km/h) |
| 85 mph (136.79 km/h) | 83.08 mph (133.7 km/h) |
| 90 mph (144.84 km/h) | 87.97 mph (141.57 km/h) |
| 95 mph (152.89 km/h) | 92.85 mph (149.43 km/h) |
| 100 mph (160.93 km/h) | 97.74 mph (157.3 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2036 | 2365 | 2547 | 2659 | 2781 | 2867 | 2963 | 3075 | 3231 | 3387 | 3560 | 3699 | 3950 | 4227 | 4444 | 4582 | 4660 | 4946 | 5345 | 6211 |
Better Fuel Economy Factory Ratios Increased Power
