Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/30-20 | 345/30-22 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.15 (715) | 30.15 (765.8) | 2 (50.8) 7.1% |
| Width inches (mm) | 13.58 (345) | 13.58 (345) | 0 (0) 0% |
| Circum. inches (mm) | 88.43 (2246.24) | 94.72 (2405.83) | 6.28 (159.59) 7.1% |
| Sidewall Height inches (mm) | 4.07 (103.5) | 4.07 (103.5) | 0 (0) 0% |
| Revolutions per mile (km) | 716.46 (445.19) | 668.93 (415.66) | -47.53 (-29.53) -6.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.42 mph (34.47 km/h) |
| 25 mph (40.23 km/h) | 26.78 mph (43.09 km/h) |
| 30 mph (48.28 km/h) | 32.13 mph (51.71 km/h) |
| 35 mph (56.33 km/h) | 37.49 mph (60.33 km/h) |
| 40 mph (64.37 km/h) | 42.84 mph (68.95 km/h) |
| 45 mph (72.42 km/h) | 48.2 mph (77.57 km/h) |
| 50 mph (80.47 km/h) | 53.55 mph (86.18 km/h) |
| 55 mph (88.51 km/h) | 58.91 mph (94.8 km/h) |
| 60 mph (96.56 km/h) | 64.26 mph (103.42 km/h) |
| 65 mph (104.61 km/h) | 69.62 mph (112.04 km/h) |
| 70 mph (112.65 km/h) | 74.97 mph (120.66 km/h) |
| 75 mph (120.7 km/h) | 80.33 mph (129.28 km/h) |
| 80 mph (128.75 km/h) | 85.68 mph (137.9 km/h) |
| 85 mph (136.79 km/h) | 91.04 mph (146.51 km/h) |
| 90 mph (144.84 km/h) | 96.39 mph (155.13 km/h) |
| 95 mph (152.89 km/h) | 101.75 mph (163.75 km/h) |
| 100 mph (160.93 km/h) | 107.1 mph (172.37 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1702 | 1978 | 2130 | 2224 | 2325 | 2398 | 2477 | 2572 | 2702 | 2832 | 2977 | 3093 | 3303 | 3535 | 3716 | 3832 | 3897 | 4136 | 4469 | 5194 |
Better Fuel Economy Factory Ratios Increased Power
