Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/60-18 | 290/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.32 (643.2) | 30.56 (776.2) | 5.24 (133) 20.7% |
| Width inches (mm) | 6.1 (155) | 11.42 (290) | 5.31 (135) 87.1% |
| Circum. inches (mm) | 79.55 (2020.67) | 96 (2438.5) | 16.45 (417.83) 20.7% |
| Sidewall Height inches (mm) | 3.66 (93) | 6.28 (159.5) | 2.62 (66.5) 71.5% |
| Revolutions per mile (km) | 796.44 (494.88) | 659.97 (410.09) | -136.47 (-84.8) -17.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.14 mph (38.84 km/h) |
| 25 mph (40.23 km/h) | 30.17 mph (48.55 km/h) |
| 30 mph (48.28 km/h) | 36.2 mph (58.26 km/h) |
| 35 mph (56.33 km/h) | 42.24 mph (67.97 km/h) |
| 40 mph (64.37 km/h) | 48.27 mph (77.69 km/h) |
| 45 mph (72.42 km/h) | 54.31 mph (87.4 km/h) |
| 50 mph (80.47 km/h) | 60.34 mph (97.11 km/h) |
| 55 mph (88.51 km/h) | 66.37 mph (106.82 km/h) |
| 60 mph (96.56 km/h) | 72.41 mph (116.53 km/h) |
| 65 mph (104.61 km/h) | 78.44 mph (126.24 km/h) |
| 70 mph (112.65 km/h) | 84.47 mph (135.95 km/h) |
| 75 mph (120.7 km/h) | 90.51 mph (145.66 km/h) |
| 80 mph (128.75 km/h) | 96.54 mph (155.37 km/h) |
| 85 mph (136.79 km/h) | 102.58 mph (165.08 km/h) |
| 90 mph (144.84 km/h) | 108.61 mph (174.79 km/h) |
| 95 mph (152.89 km/h) | 114.64 mph (184.5 km/h) |
| 100 mph (160.93 km/h) | 120.68 mph (194.21 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1680 | 1951 | 2101 | 2194 | 2294 | 2366 | 2444 | 2537 | 2666 | 2794 | 2937 | 3052 | 3259 | 3488 | 3666 | 3781 | 3845 | 4081 | 4410 | 5124 |
Better Fuel Economy Factory Ratios Increased Power
