Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-20 | 325/90-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.4 (670.5) | 43.03 (1093) | 16.63 (422.5) 63% |
| Width inches (mm) | 12.8 (325) | 12.8 (325) | 0 (0) 0% |
| Circum. inches (mm) | 82.93 (2106.44) | 135.19 (3433.76) | 52.26 (1327.32) 63% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 11.52 (292.5) | 8.32 (211.25) 260% |
| Revolutions per mile (km) | 764.01 (474.73) | 468.68 (291.23) | -295.33 (-183.51) -38.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 32.6 mph (52.47 km/h) |
| 25 mph (40.23 km/h) | 40.75 mph (65.59 km/h) |
| 30 mph (48.28 km/h) | 48.9 mph (78.7 km/h) |
| 35 mph (56.33 km/h) | 57.05 mph (91.82 km/h) |
| 40 mph (64.37 km/h) | 65.21 mph (104.94 km/h) |
| 45 mph (72.42 km/h) | 73.36 mph (118.05 km/h) |
| 50 mph (80.47 km/h) | 81.51 mph (131.17 km/h) |
| 55 mph (88.51 km/h) | 89.66 mph (144.29 km/h) |
| 60 mph (96.56 km/h) | 97.81 mph (157.41 km/h) |
| 65 mph (104.61 km/h) | 105.96 mph (170.52 km/h) |
| 70 mph (112.65 km/h) | 114.11 mph (183.64 km/h) |
| 75 mph (120.7 km/h) | 122.26 mph (196.76 km/h) |
| 80 mph (128.75 km/h) | 130.41 mph (209.88 km/h) |
| 85 mph (136.79 km/h) | 138.56 mph (222.99 km/h) |
| 90 mph (144.84 km/h) | 146.71 mph (236.11 km/h) |
| 95 mph (152.89 km/h) | 154.86 mph (249.23 km/h) |
| 100 mph (160.93 km/h) | 163.01 mph (262.34 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1193 | 1386 | 1492 | 1558 | 1629 | 1680 | 1736 | 1802 | 1893 | 1984 | 2086 | 2167 | 2314 | 2477 | 2604 | 2685 | 2731 | 2898 | 3131 | 3639 |
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