Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/30-20 | 205/75-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.15 (715) | 32.11 (815.5) | 3.96 (100.5) 14.1% |
| Width inches (mm) | 13.58 (345) | 8.07 (205) | -5.51 (-140) -40.6% |
| Circum. inches (mm) | 88.43 (2246.24) | 100.86 (2561.97) | 12.43 (315.73) 14.1% |
| Sidewall Height inches (mm) | 4.07 (103.5) | 6.05 (153.75) | 1.98 (50.25) 48.6% |
| Revolutions per mile (km) | 716.46 (445.19) | 628.17 (390.32) | -88.29 (-54.86) -12.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.81 mph (36.71 km/h) |
| 25 mph (40.23 km/h) | 28.51 mph (45.89 km/h) |
| 30 mph (48.28 km/h) | 34.22 mph (55.07 km/h) |
| 35 mph (56.33 km/h) | 39.92 mph (64.24 km/h) |
| 40 mph (64.37 km/h) | 45.62 mph (73.42 km/h) |
| 45 mph (72.42 km/h) | 51.33 mph (82.6 km/h) |
| 50 mph (80.47 km/h) | 57.03 mph (91.78 km/h) |
| 55 mph (88.51 km/h) | 62.73 mph (100.96 km/h) |
| 60 mph (96.56 km/h) | 68.43 mph (110.13 km/h) |
| 65 mph (104.61 km/h) | 74.14 mph (119.31 km/h) |
| 70 mph (112.65 km/h) | 79.84 mph (128.49 km/h) |
| 75 mph (120.7 km/h) | 85.54 mph (137.67 km/h) |
| 80 mph (128.75 km/h) | 91.24 mph (146.84 km/h) |
| 85 mph (136.79 km/h) | 96.95 mph (156.02 km/h) |
| 90 mph (144.84 km/h) | 102.65 mph (165.2 km/h) |
| 95 mph (152.89 km/h) | 108.35 mph (174.38 km/h) |
| 100 mph (160.93 km/h) | 114.06 mph (183.56 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1599 | 1857 | 2000 | 2088 | 2184 | 2252 | 2326 | 2415 | 2537 | 2660 | 2796 | 2905 | 3102 | 3320 | 3490 | 3598 | 3660 | 3884 | 4197 | 4877 |
Better Fuel Economy Factory Ratios Increased Power
