Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/30-20 | 345/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.15 (715) | 33.58 (853) | 5.43 (138) 19.3% |
| Width inches (mm) | 13.58 (345) | 13.58 (345) | 0 (0) 0% |
| Circum. inches (mm) | 88.43 (2246.24) | 105.5 (2679.78) | 17.07 (433.54) 19.3% |
| Sidewall Height inches (mm) | 4.07 (103.5) | 6.79 (172.5) | 2.72 (69) 66.7% |
| Revolutions per mile (km) | 716.46 (445.19) | 600.55 (373.16) | -115.91 (-72.02) -16.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.86 mph (38.4 km/h) |
| 25 mph (40.23 km/h) | 29.83 mph (48 km/h) |
| 30 mph (48.28 km/h) | 35.79 mph (57.6 km/h) |
| 35 mph (56.33 km/h) | 41.76 mph (67.2 km/h) |
| 40 mph (64.37 km/h) | 47.72 mph (76.8 km/h) |
| 45 mph (72.42 km/h) | 53.69 mph (86.4 km/h) |
| 50 mph (80.47 km/h) | 59.65 mph (96 km/h) |
| 55 mph (88.51 km/h) | 65.62 mph (105.6 km/h) |
| 60 mph (96.56 km/h) | 71.58 mph (115.2 km/h) |
| 65 mph (104.61 km/h) | 77.55 mph (124.8 km/h) |
| 70 mph (112.65 km/h) | 83.51 mph (134.4 km/h) |
| 75 mph (120.7 km/h) | 89.48 mph (144 km/h) |
| 80 mph (128.75 km/h) | 95.44 mph (153.6 km/h) |
| 85 mph (136.79 km/h) | 101.41 mph (163.2 km/h) |
| 90 mph (144.84 km/h) | 107.37 mph (172.8 km/h) |
| 95 mph (152.89 km/h) | 113.34 mph (182.4 km/h) |
| 100 mph (160.93 km/h) | 119.3 mph (192 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1528 | 1775 | 1912 | 1997 | 2088 | 2153 | 2224 | 2309 | 2426 | 2543 | 2673 | 2777 | 2966 | 3174 | 3336 | 3440 | 3499 | 3713 | 4013 | 4663 |
Better Fuel Economy Factory Ratios Increased Power
