Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/25-20 | 345/25-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.2 (665.5) | 26.79 (680.5) | 0.59 (15) 2.3% |
| Width inches (mm) | 12.4 (315) | 13.58 (345) | 1.18 (30) 9.5% |
| Circum. inches (mm) | 82.31 (2090.73) | 84.17 (2137.85) | 1.86 (47.12) 2.3% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 3.4 (86.25) | 0.3 (7.5) 9.5% |
| Revolutions per mile (km) | 769.75 (478.3) | 752.78 (467.76) | -16.97 (-10.54) -2.2% |
345/25-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.45 mph (32.91 km/h) |
| 25 mph (40.23 km/h) | 25.56 mph (41.14 km/h) |
| 30 mph (48.28 km/h) | 30.68 mph (49.37 km/h) |
| 35 mph (56.33 km/h) | 35.79 mph (57.6 km/h) |
| 40 mph (64.37 km/h) | 40.9 mph (65.82 km/h) |
| 45 mph (72.42 km/h) | 46.01 mph (74.05 km/h) |
| 50 mph (80.47 km/h) | 51.13 mph (82.28 km/h) |
| 55 mph (88.51 km/h) | 56.24 mph (90.51 km/h) |
| 60 mph (96.56 km/h) | 61.35 mph (98.74 km/h) |
| 65 mph (104.61 km/h) | 66.47 mph (106.97 km/h) |
| 70 mph (112.65 km/h) | 71.58 mph (115.19 km/h) |
| 75 mph (120.7 km/h) | 76.69 mph (123.42 km/h) |
| 80 mph (128.75 km/h) | 81.8 mph (131.65 km/h) |
| 85 mph (136.79 km/h) | 86.92 mph (139.88 km/h) |
| 90 mph (144.84 km/h) | 92.03 mph (148.11 km/h) |
| 95 mph (152.89 km/h) | 97.14 mph (156.33 km/h) |
| 100 mph (160.93 km/h) | 102.25 mph (164.56 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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