Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/60-20 | 175/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.8 (706) | 27.58 (700.5) | -0.22 (-5.5) -0.8% |
| Width inches (mm) | 6.5 (165) | 6.89 (175) | 0.39 (10) 6.1% |
| Circum. inches (mm) | 87.32 (2217.96) | 86.64 (2200.69) | -0.68 (-17.28) -0.8% |
| Sidewall Height inches (mm) | 3.9 (99) | 3.79 (96.25) | -0.11 (-2.75) -2.8% |
| Revolutions per mile (km) | 725.6 (450.86) | 731.29 (454.4) | 5.7 (3.54) 0.8% |
175/55-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.84 mph (31.94 km/h) |
| 25 mph (40.23 km/h) | 24.81 mph (39.92 km/h) |
| 30 mph (48.28 km/h) | 29.77 mph (47.9 km/h) |
| 35 mph (56.33 km/h) | 34.73 mph (55.89 km/h) |
| 40 mph (64.37 km/h) | 39.69 mph (63.87 km/h) |
| 45 mph (72.42 km/h) | 44.65 mph (71.86 km/h) |
| 50 mph (80.47 km/h) | 49.61 mph (79.84 km/h) |
| 55 mph (88.51 km/h) | 54.57 mph (87.82 km/h) |
| 60 mph (96.56 km/h) | 59.53 mph (95.81 km/h) |
| 65 mph (104.61 km/h) | 64.49 mph (103.79 km/h) |
| 70 mph (112.65 km/h) | 69.45 mph (111.78 km/h) |
| 75 mph (120.7 km/h) | 74.42 mph (119.76 km/h) |
| 80 mph (128.75 km/h) | 79.38 mph (127.74 km/h) |
| 85 mph (136.79 km/h) | 84.34 mph (135.73 km/h) |
| 90 mph (144.84 km/h) | 89.3 mph (143.71 km/h) |
| 95 mph (152.89 km/h) | 94.26 mph (151.7 km/h) |
| 100 mph (160.93 km/h) | 99.22 mph (159.68 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1861 | 2162 | 2328 | 2431 | 2542 | 2621 | 2708 | 2811 | 2954 | 3096 | 3255 | 3381 | 3611 | 3865 | 4063 | 4189 | 4260 | 4522 | 4886 | 5678 |
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