Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/25-20 | 255/20-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.79 (680.5) | 24.02 (610) | -2.78 (-70.5) -10.4% |
| Width inches (mm) | 13.58 (345) | 10.04 (255) | -3.54 (-90) -26.1% |
| Circum. inches (mm) | 84.17 (2137.85) | 75.45 (1916.37) | -8.72 (-221.48) -10.4% |
| Sidewall Height inches (mm) | 3.4 (86.25) | 2.01 (51) | -1.39 (-35.25) -40.9% |
| Revolutions per mile (km) | 752.78 (467.76) | 839.79 (521.82) | 87 (54.06) 11.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.93 mph (28.85 km/h) |
| 25 mph (40.23 km/h) | 22.41 mph (36.07 km/h) |
| 30 mph (48.28 km/h) | 26.89 mph (43.28 km/h) |
| 35 mph (56.33 km/h) | 31.37 mph (50.49 km/h) |
| 40 mph (64.37 km/h) | 35.86 mph (57.7 km/h) |
| 45 mph (72.42 km/h) | 40.34 mph (64.92 km/h) |
| 50 mph (80.47 km/h) | 44.82 mph (72.13 km/h) |
| 55 mph (88.51 km/h) | 49.3 mph (79.34 km/h) |
| 60 mph (96.56 km/h) | 53.78 mph (86.56 km/h) |
| 65 mph (104.61 km/h) | 58.27 mph (93.77 km/h) |
| 70 mph (112.65 km/h) | 62.75 mph (100.98 km/h) |
| 75 mph (120.7 km/h) | 67.23 mph (108.2 km/h) |
| 80 mph (128.75 km/h) | 71.71 mph (115.41 km/h) |
| 85 mph (136.79 km/h) | 76.19 mph (122.62 km/h) |
| 90 mph (144.84 km/h) | 80.68 mph (129.84 km/h) |
| 95 mph (152.89 km/h) | 85.16 mph (137.05 km/h) |
| 100 mph (160.93 km/h) | 89.64 mph (144.26 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2137 | 2483 | 2674 | 2792 | 2919 | 3010 | 3110 | 3228 | 3392 | 3556 | 3738 | 3883 | 4147 | 4438 | 4665 | 4811 | 4893 | 5193 | 5611 | 6520 |
Better Fuel Economy Factory Ratios Increased Power
