Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/70-20 | 205/85-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.09 (739) | 33.72 (856.5) | 4.63 (117.5) 15.9% |
| Width inches (mm) | 6.5 (165) | 8.07 (205) | 1.57 (40) 24.2% |
| Circum. inches (mm) | 91.4 (2321.64) | 105.94 (2690.77) | 14.53 (369.14) 15.9% |
| Sidewall Height inches (mm) | 4.55 (115.5) | 6.86 (174.25) | 2.31 (58.75) 50.9% |
| Revolutions per mile (km) | 693.19 (430.73) | 598.1 (371.64) | -95.1 (-59.09) -13.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.18 mph (37.3 km/h) |
| 25 mph (40.23 km/h) | 28.97 mph (46.63 km/h) |
| 30 mph (48.28 km/h) | 34.77 mph (55.96 km/h) |
| 35 mph (56.33 km/h) | 40.56 mph (65.28 km/h) |
| 40 mph (64.37 km/h) | 46.36 mph (74.61 km/h) |
| 45 mph (72.42 km/h) | 52.15 mph (83.94 km/h) |
| 50 mph (80.47 km/h) | 57.95 mph (93.26 km/h) |
| 55 mph (88.51 km/h) | 63.74 mph (102.59 km/h) |
| 60 mph (96.56 km/h) | 69.54 mph (111.91 km/h) |
| 65 mph (104.61 km/h) | 75.33 mph (121.24 km/h) |
| 70 mph (112.65 km/h) | 81.13 mph (130.57 km/h) |
| 75 mph (120.7 km/h) | 86.92 mph (139.89 km/h) |
| 80 mph (128.75 km/h) | 92.72 mph (149.22 km/h) |
| 85 mph (136.79 km/h) | 98.51 mph (158.54 km/h) |
| 90 mph (144.84 km/h) | 104.31 mph (167.87 km/h) |
| 95 mph (152.89 km/h) | 110.1 mph (177.2 km/h) |
| 100 mph (160.93 km/h) | 115.9 mph (186.52 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1522 | 1768 | 1904 | 1988 | 2079 | 2144 | 2215 | 2299 | 2416 | 2532 | 2662 | 2766 | 2953 | 3161 | 3323 | 3426 | 3485 | 3698 | 3996 | 4644 |
Better Fuel Economy Factory Ratios Increased Power
