Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/60-18 | 405/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.32 (643.2) | 40.32 (1024.2) | 15 (381) 59.2% |
| Width inches (mm) | 6.1 (155) | 15.94 (405) | 9.84 (250) 161.3% |
| Circum. inches (mm) | 79.55 (2020.67) | 126.68 (3217.62) | 47.12 (1196.95) 59.2% |
| Sidewall Height inches (mm) | 3.66 (93) | 11.16 (283.5) | 7.5 (190.5) 204.8% |
| Revolutions per mile (km) | 796.44 (494.88) | 500.17 (310.79) | -296.27 (-184.1) -37.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 31.85 mph (51.25 km/h) |
| 25 mph (40.23 km/h) | 39.81 mph (64.07 km/h) |
| 30 mph (48.28 km/h) | 47.77 mph (76.88 km/h) |
| 35 mph (56.33 km/h) | 55.73 mph (89.69 km/h) |
| 40 mph (64.37 km/h) | 63.69 mph (102.51 km/h) |
| 45 mph (72.42 km/h) | 71.66 mph (115.32 km/h) |
| 50 mph (80.47 km/h) | 79.62 mph (128.13 km/h) |
| 55 mph (88.51 km/h) | 87.58 mph (140.95 km/h) |
| 60 mph (96.56 km/h) | 95.54 mph (153.76 km/h) |
| 65 mph (104.61 km/h) | 103.5 mph (166.57 km/h) |
| 70 mph (112.65 km/h) | 111.46 mph (179.39 km/h) |
| 75 mph (120.7 km/h) | 119.43 mph (192.2 km/h) |
| 80 mph (128.75 km/h) | 127.39 mph (205.01 km/h) |
| 85 mph (136.79 km/h) | 135.35 mph (217.82 km/h) |
| 90 mph (144.84 km/h) | 143.31 mph (230.64 km/h) |
| 95 mph (152.89 km/h) | 151.27 mph (243.45 km/h) |
| 100 mph (160.93 km/h) | 159.24 mph (256.26 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1273 | 1479 | 1592 | 1663 | 1739 | 1793 | 1852 | 1923 | 2020 | 2118 | 2226 | 2313 | 2470 | 2643 | 2779 | 2865 | 2914 | 3093 | 3342 | 3883 |
Better Fuel Economy Factory Ratios Increased Power
