Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/55-16 | 175/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.58 (598.9) | 25.58 (649.7) | 2 (50.8) 8.5% |
| Width inches (mm) | 6.89 (175) | 6.89 (175) | 0 (0) 0% |
| Circum. inches (mm) | 74.07 (1881.5) | 80.36 (2041.09) | 6.28 (159.59) 8.5% |
| Sidewall Height inches (mm) | 3.79 (96.25) | 3.79 (96.25) | 0 (0) 0% |
| Revolutions per mile (km) | 855.35 (531.49) | 788.47 (489.93) | -66.88 (-41.56) -7.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.7 mph (34.92 km/h) |
| 25 mph (40.23 km/h) | 27.12 mph (43.65 km/h) |
| 30 mph (48.28 km/h) | 32.54 mph (52.38 km/h) |
| 35 mph (56.33 km/h) | 37.97 mph (61.1 km/h) |
| 40 mph (64.37 km/h) | 43.39 mph (69.83 km/h) |
| 45 mph (72.42 km/h) | 48.82 mph (78.56 km/h) |
| 50 mph (80.47 km/h) | 54.24 mph (87.29 km/h) |
| 55 mph (88.51 km/h) | 59.67 mph (96.02 km/h) |
| 60 mph (96.56 km/h) | 65.09 mph (104.75 km/h) |
| 65 mph (104.61 km/h) | 70.51 mph (113.48 km/h) |
| 70 mph (112.65 km/h) | 75.94 mph (122.21 km/h) |
| 75 mph (120.7 km/h) | 81.36 mph (130.94 km/h) |
| 80 mph (128.75 km/h) | 86.79 mph (139.67 km/h) |
| 85 mph (136.79 km/h) | 92.21 mph (148.4 km/h) |
| 90 mph (144.84 km/h) | 97.63 mph (157.13 km/h) |
| 95 mph (152.89 km/h) | 103.06 mph (165.86 km/h) |
| 100 mph (160.93 km/h) | 108.48 mph (174.59 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2007 | 2331 | 2510 | 2621 | 2741 | 2826 | 2920 | 3031 | 3185 | 3338 | 3509 | 3646 | 3893 | 4167 | 4380 | 4517 | 4594 | 4875 | 5268 | 6122 |
Better Fuel Economy Factory Ratios Increased Power
