Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/50-20 | 245/80-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.65 (753) | 35.43 (900) | 5.79 (147) 19.5% |
| Width inches (mm) | 9.65 (245) | 9.65 (245) | 0 (0) 0% |
| Circum. inches (mm) | 93.13 (2365.62) | 111.32 (2827.43) | 18.18 (461.81) 19.5% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 7.72 (196) | 2.89 (73.5) 60% |
| Revolutions per mile (km) | 680.31 (422.72) | 569.19 (353.68) | -111.12 (-69.04) -16.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.9 mph (38.47 km/h) |
| 25 mph (40.23 km/h) | 29.88 mph (48.09 km/h) |
| 30 mph (48.28 km/h) | 35.86 mph (57.71 km/h) |
| 35 mph (56.33 km/h) | 41.83 mph (67.32 km/h) |
| 40 mph (64.37 km/h) | 47.81 mph (76.94 km/h) |
| 45 mph (72.42 km/h) | 53.78 mph (86.56 km/h) |
| 50 mph (80.47 km/h) | 59.76 mph (96.18 km/h) |
| 55 mph (88.51 km/h) | 65.74 mph (105.79 km/h) |
| 60 mph (96.56 km/h) | 71.71 mph (115.41 km/h) |
| 65 mph (104.61 km/h) | 77.69 mph (125.03 km/h) |
| 70 mph (112.65 km/h) | 83.67 mph (134.65 km/h) |
| 75 mph (120.7 km/h) | 89.64 mph (144.26 km/h) |
| 80 mph (128.75 km/h) | 95.62 mph (153.88 km/h) |
| 85 mph (136.79 km/h) | 101.59 mph (163.5 km/h) |
| 90 mph (144.84 km/h) | 107.57 mph (173.12 km/h) |
| 95 mph (152.89 km/h) | 113.55 mph (182.73 km/h) |
| 100 mph (160.93 km/h) | 119.52 mph (192.35 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1448 | 1683 | 1812 | 1892 | 1979 | 2040 | 2108 | 2188 | 2299 | 2410 | 2533 | 2632 | 2811 | 3008 | 3162 | 3261 | 3316 | 3519 | 3803 | 4419 |
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