Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/55-20 | 245/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.18 (766.5) | 29.65 (753) | -0.53 (-13.5) -1.8% |
| Width inches (mm) | 9.25 (235) | 9.65 (245) | 0.39 (10) 4.3% |
| Circum. inches (mm) | 94.8 (2408.03) | 93.13 (2365.62) | -1.67 (-42.41) -1.8% |
| Sidewall Height inches (mm) | 5.09 (129.25) | 4.82 (122.5) | -0.27 (-6.75) -5.2% |
| Revolutions per mile (km) | 668.32 (415.28) | 680.31 (422.72) | 11.98 (7.45) 1.8% |
245/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.65 mph (31.62 km/h) |
| 25 mph (40.23 km/h) | 24.56 mph (39.53 km/h) |
| 30 mph (48.28 km/h) | 29.47 mph (47.43 km/h) |
| 35 mph (56.33 km/h) | 34.38 mph (55.34 km/h) |
| 40 mph (64.37 km/h) | 39.3 mph (63.24 km/h) |
| 45 mph (72.42 km/h) | 44.21 mph (71.15 km/h) |
| 50 mph (80.47 km/h) | 49.12 mph (79.05 km/h) |
| 55 mph (88.51 km/h) | 54.03 mph (86.96 km/h) |
| 60 mph (96.56 km/h) | 58.94 mph (94.86 km/h) |
| 65 mph (104.61 km/h) | 63.86 mph (102.77 km/h) |
| 70 mph (112.65 km/h) | 68.77 mph (110.67 km/h) |
| 75 mph (120.7 km/h) | 73.68 mph (118.58 km/h) |
| 80 mph (128.75 km/h) | 78.59 mph (126.48 km/h) |
| 85 mph (136.79 km/h) | 83.5 mph (134.39 km/h) |
| 90 mph (144.84 km/h) | 88.41 mph (142.29 km/h) |
| 95 mph (152.89 km/h) | 93.33 mph (150.2 km/h) |
| 100 mph (160.93 km/h) | 98.24 mph (158.1 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1731 | 2011 | 2166 | 2262 | 2365 | 2438 | 2520 | 2615 | 2748 | 2881 | 3028 | 3146 | 3359 | 3595 | 3779 | 3897 | 3963 | 4207 | 4545 | 5282 |
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