Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/30-20 | 205/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.15 (715) | 28.07 (713) | -0.08 (-2) -0.3% |
| Width inches (mm) | 13.58 (345) | 8.07 (205) | -5.51 (-140) -40.6% |
| Circum. inches (mm) | 88.43 (2246.24) | 88.19 (2239.96) | -0.25 (-6.28) -0.3% |
| Sidewall Height inches (mm) | 4.07 (103.5) | 4.04 (102.5) | -0.04 (-1) -1% |
| Revolutions per mile (km) | 716.46 (445.19) | 718.47 (446.44) | 2.01 (1.25) 0.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.94 mph (32.1 km/h) |
| 25 mph (40.23 km/h) | 24.93 mph (40.12 km/h) |
| 30 mph (48.28 km/h) | 29.92 mph (48.15 km/h) |
| 35 mph (56.33 km/h) | 34.9 mph (56.17 km/h) |
| 40 mph (64.37 km/h) | 39.89 mph (64.19 km/h) |
| 45 mph (72.42 km/h) | 44.87 mph (72.22 km/h) |
| 50 mph (80.47 km/h) | 49.86 mph (80.24 km/h) |
| 55 mph (88.51 km/h) | 54.85 mph (88.27 km/h) |
| 60 mph (96.56 km/h) | 59.83 mph (96.29 km/h) |
| 65 mph (104.61 km/h) | 64.82 mph (104.31 km/h) |
| 70 mph (112.65 km/h) | 69.8 mph (112.34 km/h) |
| 75 mph (120.7 km/h) | 74.79 mph (120.36 km/h) |
| 80 mph (128.75 km/h) | 79.78 mph (128.39 km/h) |
| 85 mph (136.79 km/h) | 84.76 mph (136.41 km/h) |
| 90 mph (144.84 km/h) | 89.75 mph (144.44 km/h) |
| 95 mph (152.89 km/h) | 94.73 mph (152.46 km/h) |
| 100 mph (160.93 km/h) | 99.72 mph (160.48 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1828 | 2124 | 2287 | 2389 | 2497 | 2575 | 2661 | 2762 | 2902 | 3042 | 3198 | 3322 | 3548 | 3797 | 3991 | 4116 | 4186 | 4443 | 4800 | 5578 |
Better Fuel Economy Factory Ratios Increased Power
