Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/70-20 | 175/80-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.09 (739) | 31.02 (788) | 1.93 (49) 6.6% |
| Width inches (mm) | 6.5 (165) | 6.89 (175) | 0.39 (10) 6.1% |
| Circum. inches (mm) | 91.4 (2321.64) | 97.46 (2475.58) | 6.06 (153.94) 6.6% |
| Sidewall Height inches (mm) | 4.55 (115.5) | 5.51 (140) | 0.96 (24.5) 21.2% |
| Revolutions per mile (km) | 693.19 (430.73) | 650.09 (403.95) | -43.1 (-26.78) -6.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.33 mph (34.32 km/h) |
| 25 mph (40.23 km/h) | 26.66 mph (42.9 km/h) |
| 30 mph (48.28 km/h) | 31.99 mph (51.48 km/h) |
| 35 mph (56.33 km/h) | 37.32 mph (60.06 km/h) |
| 40 mph (64.37 km/h) | 42.65 mph (68.64 km/h) |
| 45 mph (72.42 km/h) | 47.98 mph (77.22 km/h) |
| 50 mph (80.47 km/h) | 53.32 mph (85.8 km/h) |
| 55 mph (88.51 km/h) | 58.65 mph (94.38 km/h) |
| 60 mph (96.56 km/h) | 63.98 mph (102.96 km/h) |
| 65 mph (104.61 km/h) | 69.31 mph (111.54 km/h) |
| 70 mph (112.65 km/h) | 74.64 mph (120.12 km/h) |
| 75 mph (120.7 km/h) | 79.97 mph (128.7 km/h) |
| 80 mph (128.75 km/h) | 85.3 mph (137.28 km/h) |
| 85 mph (136.79 km/h) | 90.64 mph (145.86 km/h) |
| 90 mph (144.84 km/h) | 95.97 mph (154.45 km/h) |
| 95 mph (152.89 km/h) | 101.3 mph (163.03 km/h) |
| 100 mph (160.93 km/h) | 106.63 mph (171.61 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1654 | 1922 | 2070 | 2161 | 2260 | 2330 | 2408 | 2499 | 2626 | 2753 | 2893 | 3006 | 3210 | 3435 | 3611 | 3724 | 3787 | 4020 | 4344 | 5048 |
Better Fuel Economy Factory Ratios Increased Power
