Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-18 | 155/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.54 (674.2) | 24.71 (627.7) | -1.83 (-46.5) -6.9% |
| Width inches (mm) | 6.1 (155) | 6.1 (155) | 0 (0) 0% |
| Circum. inches (mm) | 83.39 (2118.06) | 77.64 (1971.98) | -5.75 (-146.08) -6.9% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 3.36 (85.25) | -0.92 (-23.25) -21.4% |
| Revolutions per mile (km) | 759.82 (472.13) | 816.11 (507.1) | 56.29 (34.98) 7.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.62 mph (29.97 km/h) |
| 25 mph (40.23 km/h) | 23.28 mph (37.46 km/h) |
| 30 mph (48.28 km/h) | 27.93 mph (44.95 km/h) |
| 35 mph (56.33 km/h) | 32.59 mph (52.44 km/h) |
| 40 mph (64.37 km/h) | 37.24 mph (59.93 km/h) |
| 45 mph (72.42 km/h) | 41.9 mph (67.43 km/h) |
| 50 mph (80.47 km/h) | 46.55 mph (74.92 km/h) |
| 55 mph (88.51 km/h) | 51.21 mph (82.41 km/h) |
| 60 mph (96.56 km/h) | 55.86 mph (89.9 km/h) |
| 65 mph (104.61 km/h) | 60.52 mph (97.39 km/h) |
| 70 mph (112.65 km/h) | 65.17 mph (104.88 km/h) |
| 75 mph (120.7 km/h) | 69.83 mph (112.38 km/h) |
| 80 mph (128.75 km/h) | 74.48 mph (119.87 km/h) |
| 85 mph (136.79 km/h) | 79.14 mph (127.36 km/h) |
| 90 mph (144.84 km/h) | 83.79 mph (134.85 km/h) |
| 95 mph (152.89 km/h) | 88.45 mph (142.34 km/h) |
| 100 mph (160.93 km/h) | 93.1 mph (149.83 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2077 | 2413 | 2598 | 2713 | 2837 | 2925 | 3022 | 3137 | 3296 | 3456 | 3632 | 3774 | 4030 | 4313 | 4534 | 4675 | 4755 | 5046 | 5453 | 6337 |
Better Fuel Economy Factory Ratios Increased Power
