Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-18 | 165/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.54 (674.2) | 25.15 (638.7) | -1.4 (-35.5) -5.3% |
| Width inches (mm) | 6.1 (155) | 6.5 (165) | 0.39 (10) 6.5% |
| Circum. inches (mm) | 83.39 (2118.06) | 79 (2006.54) | -4.39 (-111.53) -5.3% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 3.57 (90.75) | -0.7 (-17.75) -16.4% |
| Revolutions per mile (km) | 759.82 (472.13) | 802.05 (498.37) | 42.23 (26.24) 5.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.95 mph (30.49 km/h) |
| 25 mph (40.23 km/h) | 23.68 mph (38.12 km/h) |
| 30 mph (48.28 km/h) | 28.42 mph (45.74 km/h) |
| 35 mph (56.33 km/h) | 33.16 mph (53.36 km/h) |
| 40 mph (64.37 km/h) | 37.89 mph (60.98 km/h) |
| 45 mph (72.42 km/h) | 42.63 mph (68.61 km/h) |
| 50 mph (80.47 km/h) | 47.37 mph (76.23 km/h) |
| 55 mph (88.51 km/h) | 52.1 mph (83.85 km/h) |
| 60 mph (96.56 km/h) | 56.84 mph (91.48 km/h) |
| 65 mph (104.61 km/h) | 61.58 mph (99.1 km/h) |
| 70 mph (112.65 km/h) | 66.31 mph (106.72 km/h) |
| 75 mph (120.7 km/h) | 71.05 mph (114.35 km/h) |
| 80 mph (128.75 km/h) | 75.79 mph (121.97 km/h) |
| 85 mph (136.79 km/h) | 80.52 mph (129.59 km/h) |
| 90 mph (144.84 km/h) | 85.26 mph (137.21 km/h) |
| 95 mph (152.89 km/h) | 90 mph (144.84 km/h) |
| 100 mph (160.93 km/h) | 94.73 mph (152.46 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2041 | 2371 | 2554 | 2666 | 2788 | 2875 | 2970 | 3083 | 3240 | 3396 | 3570 | 3709 | 3961 | 4238 | 4456 | 4595 | 4673 | 4959 | 5359 | 6227 |
Better Fuel Economy Factory Ratios Increased Power
