Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 290/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 35.13 (892.2) | 4.72 (120) 15.5% |
| Width inches (mm) | 6.89 (175) | 11.42 (290) | 4.53 (115) 65.7% |
| Circum. inches (mm) | 95.51 (2425.94) | 110.35 (2802.93) | 14.84 (376.99) 15.5% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 8.56 (217.5) | 2.36 (60) 38.1% |
| Revolutions per mile (km) | 663.39 (412.21) | 574.17 (356.77) | -89.23 (-55.44) -13.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.11 mph (37.19 km/h) |
| 25 mph (40.23 km/h) | 28.89 mph (46.49 km/h) |
| 30 mph (48.28 km/h) | 34.66 mph (55.78 km/h) |
| 35 mph (56.33 km/h) | 40.44 mph (65.08 km/h) |
| 40 mph (64.37 km/h) | 46.22 mph (74.38 km/h) |
| 45 mph (72.42 km/h) | 51.99 mph (83.67 km/h) |
| 50 mph (80.47 km/h) | 57.77 mph (92.97 km/h) |
| 55 mph (88.51 km/h) | 63.55 mph (102.27 km/h) |
| 60 mph (96.56 km/h) | 69.32 mph (111.57 km/h) |
| 65 mph (104.61 km/h) | 75.1 mph (120.86 km/h) |
| 70 mph (112.65 km/h) | 80.88 mph (130.16 km/h) |
| 75 mph (120.7 km/h) | 86.66 mph (139.46 km/h) |
| 80 mph (128.75 km/h) | 92.43 mph (148.76 km/h) |
| 85 mph (136.79 km/h) | 98.21 mph (158.05 km/h) |
| 90 mph (144.84 km/h) | 103.99 mph (167.35 km/h) |
| 95 mph (152.89 km/h) | 109.76 mph (176.65 km/h) |
| 100 mph (160.93 km/h) | 115.54 mph (185.94 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1461 | 1697 | 1828 | 1909 | 1996 | 2058 | 2126 | 2207 | 2319 | 2431 | 2555 | 2655 | 2835 | 3034 | 3190 | 3289 | 3345 | 3550 | 3836 | 4458 |
Better Fuel Economy Factory Ratios Increased Power
