Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/60-20 | 345/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.85 (682) | 36.3 (922) | 9.45 (240) 35.2% |
| Width inches (mm) | 5.71 (145) | 13.58 (345) | 7.87 (200) 137.9% |
| Circum. inches (mm) | 84.35 (2142.57) | 114.04 (2896.55) | 29.68 (753.98) 35.2% |
| Sidewall Height inches (mm) | 3.43 (87) | 8.15 (207) | 4.72 (120) 137.9% |
| Revolutions per mile (km) | 751.13 (466.73) | 555.61 (345.24) | -195.52 (-121.49) -26% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.04 mph (43.51 km/h) |
| 25 mph (40.23 km/h) | 33.8 mph (54.39 km/h) |
| 30 mph (48.28 km/h) | 40.56 mph (65.27 km/h) |
| 35 mph (56.33 km/h) | 47.32 mph (76.15 km/h) |
| 40 mph (64.37 km/h) | 54.08 mph (87.03 km/h) |
| 45 mph (72.42 km/h) | 60.84 mph (97.91 km/h) |
| 50 mph (80.47 km/h) | 67.6 mph (108.78 km/h) |
| 55 mph (88.51 km/h) | 74.35 mph (119.66 km/h) |
| 60 mph (96.56 km/h) | 81.11 mph (130.54 km/h) |
| 65 mph (104.61 km/h) | 87.87 mph (141.42 km/h) |
| 70 mph (112.65 km/h) | 94.63 mph (152.3 km/h) |
| 75 mph (120.7 km/h) | 101.39 mph (163.18 km/h) |
| 80 mph (128.75 km/h) | 108.15 mph (174.05 km/h) |
| 85 mph (136.79 km/h) | 114.91 mph (184.93 km/h) |
| 90 mph (144.84 km/h) | 121.67 mph (195.81 km/h) |
| 95 mph (152.89 km/h) | 128.43 mph (206.69 km/h) |
| 100 mph (160.93 km/h) | 135.19 mph (217.57 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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