Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/60-18 | 395/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.32 (643.2) | 35.11 (891.7) | 9.78 (248.5) 38.6% |
| Width inches (mm) | 6.1 (155) | 15.55 (395) | 9.45 (240) 154.8% |
| Circum. inches (mm) | 79.55 (2020.67) | 110.29 (2801.36) | 30.74 (780.69) 38.6% |
| Sidewall Height inches (mm) | 3.66 (93) | 8.55 (217.25) | 4.89 (124.25) 133.6% |
| Revolutions per mile (km) | 796.44 (494.88) | 574.49 (356.97) | -221.95 (-137.91) -27.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.73 mph (44.62 km/h) |
| 25 mph (40.23 km/h) | 34.66 mph (55.78 km/h) |
| 30 mph (48.28 km/h) | 41.59 mph (66.93 km/h) |
| 35 mph (56.33 km/h) | 48.52 mph (78.09 km/h) |
| 40 mph (64.37 km/h) | 55.45 mph (89.24 km/h) |
| 45 mph (72.42 km/h) | 62.39 mph (100.4 km/h) |
| 50 mph (80.47 km/h) | 69.32 mph (111.56 km/h) |
| 55 mph (88.51 km/h) | 76.25 mph (122.71 km/h) |
| 60 mph (96.56 km/h) | 83.18 mph (133.87 km/h) |
| 65 mph (104.61 km/h) | 90.11 mph (145.02 km/h) |
| 70 mph (112.65 km/h) | 97.04 mph (156.18 km/h) |
| 75 mph (120.7 km/h) | 103.98 mph (167.33 km/h) |
| 80 mph (128.75 km/h) | 110.91 mph (178.49 km/h) |
| 85 mph (136.79 km/h) | 117.84 mph (189.64 km/h) |
| 90 mph (144.84 km/h) | 124.77 mph (200.8 km/h) |
| 95 mph (152.89 km/h) | 131.7 mph (211.96 km/h) |
| 100 mph (160.93 km/h) | 138.63 mph (223.11 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1462 | 1698 | 1829 | 1910 | 1997 | 2059 | 2128 | 2208 | 2320 | 2432 | 2557 | 2656 | 2837 | 3036 | 3191 | 3291 | 3347 | 3552 | 3838 | 4461 |
Better Fuel Economy Factory Ratios Increased Power
