Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/30-20 | 245/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.08 (637) | 29.65 (753) | 4.57 (116) 18.2% |
| Width inches (mm) | 8.46 (215) | 9.65 (245) | 1.18 (30) 14% |
| Circum. inches (mm) | 78.79 (2001.19) | 93.13 (2365.62) | 14.35 (364.42) 18.2% |
| Sidewall Height inches (mm) | 2.54 (64.5) | 4.82 (122.5) | 2.28 (58) 89.9% |
| Revolutions per mile (km) | 804.19 (499.7) | 680.31 (422.72) | -123.89 (-76.98) -15.4% |
245/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.64 mph (38.05 km/h) |
| 25 mph (40.23 km/h) | 29.55 mph (47.56 km/h) |
| 30 mph (48.28 km/h) | 35.46 mph (57.07 km/h) |
| 35 mph (56.33 km/h) | 41.37 mph (66.58 km/h) |
| 40 mph (64.37 km/h) | 47.28 mph (76.1 km/h) |
| 45 mph (72.42 km/h) | 53.19 mph (85.61 km/h) |
| 50 mph (80.47 km/h) | 59.11 mph (95.12 km/h) |
| 55 mph (88.51 km/h) | 65.02 mph (104.63 km/h) |
| 60 mph (96.56 km/h) | 70.93 mph (114.14 km/h) |
| 65 mph (104.61 km/h) | 76.84 mph (123.66 km/h) |
| 70 mph (112.65 km/h) | 82.75 mph (133.17 km/h) |
| 75 mph (120.7 km/h) | 88.66 mph (142.68 km/h) |
| 80 mph (128.75 km/h) | 94.57 mph (152.19 km/h) |
| 85 mph (136.79 km/h) | 100.48 mph (161.71 km/h) |
| 90 mph (144.84 km/h) | 106.39 mph (171.22 km/h) |
| 95 mph (152.89 km/h) | 112.3 mph (180.73 km/h) |
| 100 mph (160.93 km/h) | 118.21 mph (190.24 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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