Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/30-20 | 345/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.15 (715) | 37.66 (956.5) | 9.51 (241.5) 33.8% |
| Width inches (mm) | 13.58 (345) | 13.58 (345) | 0 (0) 0% |
| Circum. inches (mm) | 88.43 (2246.24) | 118.3 (3004.93) | 29.87 (758.69) 33.8% |
| Sidewall Height inches (mm) | 4.07 (103.5) | 8.83 (224.25) | 4.75 (120.75) 116.7% |
| Revolutions per mile (km) | 716.46 (445.19) | 535.57 (332.79) | -180.89 (-112.4) -25.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 26.76 mph (43.06 km/h) |
| 25 mph (40.23 km/h) | 33.44 mph (53.82 km/h) |
| 30 mph (48.28 km/h) | 40.13 mph (64.59 km/h) |
| 35 mph (56.33 km/h) | 46.82 mph (75.35 km/h) |
| 40 mph (64.37 km/h) | 53.51 mph (86.12 km/h) |
| 45 mph (72.42 km/h) | 60.2 mph (96.88 km/h) |
| 50 mph (80.47 km/h) | 66.89 mph (107.65 km/h) |
| 55 mph (88.51 km/h) | 73.58 mph (118.41 km/h) |
| 60 mph (96.56 km/h) | 80.27 mph (129.18 km/h) |
| 65 mph (104.61 km/h) | 86.95 mph (139.94 km/h) |
| 70 mph (112.65 km/h) | 93.64 mph (150.7 km/h) |
| 75 mph (120.7 km/h) | 100.33 mph (161.47 km/h) |
| 80 mph (128.75 km/h) | 107.02 mph (172.23 km/h) |
| 85 mph (136.79 km/h) | 113.71 mph (183 km/h) |
| 90 mph (144.84 km/h) | 120.4 mph (193.76 km/h) |
| 95 mph (152.89 km/h) | 127.09 mph (204.53 km/h) |
| 100 mph (160.93 km/h) | 133.78 mph (215.29 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1363 | 1583 | 1705 | 1780 | 1862 | 1920 | 1983 | 2059 | 2163 | 2268 | 2384 | 2476 | 2645 | 2830 | 2975 | 3068 | 3120 | 3312 | 3578 | 4158 |
Better Fuel Economy Factory Ratios Increased Power
