Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/55-18 | 205/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.01 (660.7) | 26.88 (682.7) | 0.87 (22) 3.3% |
| Width inches (mm) | 7.28 (185) | 8.07 (205) | 0.79 (20) 10.8% |
| Circum. inches (mm) | 81.72 (2075.65) | 84.44 (2144.77) | 2.72 (69.12) 3.3% |
| Sidewall Height inches (mm) | 4.01 (101.75) | 4.44 (112.75) | 0.43 (11) 10.8% |
| Revolutions per mile (km) | 775.34 (481.78) | 750.36 (466.25) | -24.99 (-15.53) -3.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.67 mph (33.26 km/h) |
| 25 mph (40.23 km/h) | 25.83 mph (41.57 km/h) |
| 30 mph (48.28 km/h) | 31 mph (49.89 km/h) |
| 35 mph (56.33 km/h) | 36.17 mph (58.2 km/h) |
| 40 mph (64.37 km/h) | 41.33 mph (66.52 km/h) |
| 45 mph (72.42 km/h) | 46.5 mph (74.83 km/h) |
| 50 mph (80.47 km/h) | 51.66 mph (83.15 km/h) |
| 55 mph (88.51 km/h) | 56.83 mph (91.46 km/h) |
| 60 mph (96.56 km/h) | 62 mph (99.78 km/h) |
| 65 mph (104.61 km/h) | 67.16 mph (108.09 km/h) |
| 70 mph (112.65 km/h) | 72.33 mph (116.41 km/h) |
| 75 mph (120.7 km/h) | 77.5 mph (124.72 km/h) |
| 80 mph (128.75 km/h) | 82.66 mph (133.03 km/h) |
| 85 mph (136.79 km/h) | 87.83 mph (141.35 km/h) |
| 90 mph (144.84 km/h) | 93 mph (149.66 km/h) |
| 95 mph (152.89 km/h) | 98.16 mph (157.98 km/h) |
| 100 mph (160.93 km/h) | 103.33 mph (166.29 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1910 | 2218 | 2389 | 2495 | 2608 | 2690 | 2779 | 2885 | 3031 | 3177 | 3340 | 3470 | 3705 | 3965 | 4168 | 4298 | 4372 | 4640 | 5014 | 5826 |
Better Fuel Economy Factory Ratios Increased Power
