Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/60-20 | 185/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.8 (706) | 28.01 (711.5) | 0.22 (5.5) 0.8% |
| Width inches (mm) | 6.5 (165) | 7.28 (185) | 0.79 (20) 12.1% |
| Circum. inches (mm) | 87.32 (2217.96) | 88 (2235.24) | 0.68 (17.28) 0.8% |
| Sidewall Height inches (mm) | 3.9 (99) | 4.01 (101.75) | 0.11 (2.75) 2.8% |
| Revolutions per mile (km) | 725.6 (450.86) | 719.99 (447.38) | -5.61 (-3.49) -0.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.16 mph (32.44 km/h) |
| 25 mph (40.23 km/h) | 25.19 mph (40.55 km/h) |
| 30 mph (48.28 km/h) | 30.23 mph (48.66 km/h) |
| 35 mph (56.33 km/h) | 35.27 mph (56.77 km/h) |
| 40 mph (64.37 km/h) | 40.31 mph (64.88 km/h) |
| 45 mph (72.42 km/h) | 45.35 mph (72.98 km/h) |
| 50 mph (80.47 km/h) | 50.39 mph (81.09 km/h) |
| 55 mph (88.51 km/h) | 55.43 mph (89.2 km/h) |
| 60 mph (96.56 km/h) | 60.47 mph (97.31 km/h) |
| 65 mph (104.61 km/h) | 65.51 mph (105.42 km/h) |
| 70 mph (112.65 km/h) | 70.55 mph (113.53 km/h) |
| 75 mph (120.7 km/h) | 75.58 mph (121.64 km/h) |
| 80 mph (128.75 km/h) | 80.62 mph (129.75 km/h) |
| 85 mph (136.79 km/h) | 85.66 mph (137.86 km/h) |
| 90 mph (144.84 km/h) | 90.7 mph (145.97 km/h) |
| 95 mph (152.89 km/h) | 95.74 mph (154.08 km/h) |
| 100 mph (160.93 km/h) | 100.78 mph (162.19 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1832 | 2129 | 2292 | 2394 | 2503 | 2581 | 2666 | 2768 | 2908 | 3049 | 3204 | 3329 | 3555 | 3805 | 4000 | 4124 | 4195 | 4452 | 4811 | 5590 |
Better Fuel Economy Factory Ratios Increased Power
