Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/80-15 | 345/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.47 (901) | 36.3 (922) | 0.83 (21) 2.3% |
| Width inches (mm) | 12.8 (325) | 13.58 (345) | 0.79 (20) 6.2% |
| Circum. inches (mm) | 111.44 (2830.57) | 114.04 (2896.55) | 2.6 (65.97) 2.3% |
| Sidewall Height inches (mm) | 10.24 (260) | 8.15 (207) | -2.09 (-53) -20.4% |
| Revolutions per mile (km) | 568.56 (353.28) | 555.61 (345.24) | -12.95 (-8.05) -2.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.47 mph (32.94 km/h) |
| 25 mph (40.23 km/h) | 25.58 mph (41.17 km/h) |
| 30 mph (48.28 km/h) | 30.7 mph (49.41 km/h) |
| 35 mph (56.33 km/h) | 35.82 mph (57.64 km/h) |
| 40 mph (64.37 km/h) | 40.93 mph (65.87 km/h) |
| 45 mph (72.42 km/h) | 46.05 mph (74.11 km/h) |
| 50 mph (80.47 km/h) | 51.17 mph (82.34 km/h) |
| 55 mph (88.51 km/h) | 56.28 mph (90.58 km/h) |
| 60 mph (96.56 km/h) | 61.4 mph (98.81 km/h) |
| 65 mph (104.61 km/h) | 66.51 mph (107.05 km/h) |
| 70 mph (112.65 km/h) | 71.63 mph (115.28 km/h) |
| 75 mph (120.7 km/h) | 76.75 mph (123.51 km/h) |
| 80 mph (128.75 km/h) | 81.86 mph (131.75 km/h) |
| 85 mph (136.79 km/h) | 86.98 mph (139.98 km/h) |
| 90 mph (144.84 km/h) | 92.1 mph (148.22 km/h) |
| 95 mph (152.89 km/h) | 97.21 mph (156.45 km/h) |
| 100 mph (160.93 km/h) | 102.33 mph (164.69 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1414 | 1643 | 1769 | 1847 | 1931 | 1992 | 2058 | 2136 | 2244 | 2353 | 2473 | 2569 | 2744 | 2936 | 3087 | 3183 | 3237 | 3436 | 3712 | 4314 |
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