Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/25-20 | 345/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.79 (680.5) | 28.15 (715) | 1.36 (34.5) 5.1% |
| Width inches (mm) | 13.58 (345) | 13.58 (345) | 0 (0) 0% |
| Circum. inches (mm) | 84.17 (2137.85) | 88.43 (2246.24) | 4.27 (108.38) 5.1% |
| Sidewall Height inches (mm) | 3.4 (86.25) | 4.07 (103.5) | 0.68 (17.25) 20% |
| Revolutions per mile (km) | 752.78 (467.76) | 716.46 (445.19) | -36.32 (-22.57) -4.8% |
345/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.01 mph (33.82 km/h) |
| 25 mph (40.23 km/h) | 26.27 mph (42.27 km/h) |
| 30 mph (48.28 km/h) | 31.52 mph (50.73 km/h) |
| 35 mph (56.33 km/h) | 36.77 mph (59.18 km/h) |
| 40 mph (64.37 km/h) | 42.03 mph (67.64 km/h) |
| 45 mph (72.42 km/h) | 47.28 mph (76.09 km/h) |
| 50 mph (80.47 km/h) | 52.53 mph (84.55 km/h) |
| 55 mph (88.51 km/h) | 57.79 mph (93 km/h) |
| 60 mph (96.56 km/h) | 63.04 mph (101.46 km/h) |
| 65 mph (104.61 km/h) | 68.3 mph (109.91 km/h) |
| 70 mph (112.65 km/h) | 73.55 mph (118.37 km/h) |
| 75 mph (120.7 km/h) | 78.8 mph (126.82 km/h) |
| 80 mph (128.75 km/h) | 84.06 mph (135.28 km/h) |
| 85 mph (136.79 km/h) | 89.31 mph (143.73 km/h) |
| 90 mph (144.84 km/h) | 94.56 mph (152.18 km/h) |
| 95 mph (152.89 km/h) | 99.82 mph (160.64 km/h) |
| 100 mph (160.93 km/h) | 105.07 mph (169.09 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1823 | 2118 | 2281 | 2382 | 2490 | 2568 | 2653 | 2754 | 2894 | 3034 | 3189 | 3313 | 3538 | 3786 | 3980 | 4104 | 4174 | 4430 | 4787 | 5563 |
Better Fuel Economy Factory Ratios Increased Power
