Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/25-19 | 345/25-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25 (635.1) | 26.79 (680.5) | 1.79 (45.4) 7.1% |
| Width inches (mm) | 12.01 (305) | 13.58 (345) | 1.57 (40) 13.1% |
| Circum. inches (mm) | 78.55 (1995.23) | 84.17 (2137.85) | 5.62 (142.63) 7.1% |
| Sidewall Height inches (mm) | 3 (76.25) | 3.4 (86.25) | 0.39 (10) 13.1% |
| Revolutions per mile (km) | 806.6 (501.2) | 752.78 (467.76) | -53.81 (-33.44) -6.7% |
345/25-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.43 mph (34.49 km/h) |
| 25 mph (40.23 km/h) | 26.79 mph (43.11 km/h) |
| 30 mph (48.28 km/h) | 32.14 mph (51.73 km/h) |
| 35 mph (56.33 km/h) | 37.5 mph (60.35 km/h) |
| 40 mph (64.37 km/h) | 42.86 mph (68.98 km/h) |
| 45 mph (72.42 km/h) | 48.22 mph (77.6 km/h) |
| 50 mph (80.47 km/h) | 53.57 mph (86.22 km/h) |
| 55 mph (88.51 km/h) | 58.93 mph (94.84 km/h) |
| 60 mph (96.56 km/h) | 64.29 mph (103.46 km/h) |
| 65 mph (104.61 km/h) | 69.65 mph (112.09 km/h) |
| 70 mph (112.65 km/h) | 75 mph (120.71 km/h) |
| 75 mph (120.7 km/h) | 80.36 mph (129.33 km/h) |
| 80 mph (128.75 km/h) | 85.72 mph (137.95 km/h) |
| 85 mph (136.79 km/h) | 91.08 mph (146.57 km/h) |
| 90 mph (144.84 km/h) | 96.43 mph (155.2 km/h) |
| 95 mph (152.89 km/h) | 101.79 mph (163.82 km/h) |
| 100 mph (160.93 km/h) | 107.15 mph (172.44 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1916 | 2225 | 2397 | 2503 | 2617 | 2698 | 2788 | 2894 | 3041 | 3187 | 3350 | 3481 | 3717 | 3978 | 4182 | 4312 | 4386 | 4655 | 5030 | 5845 |
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