Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-18 | 245/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.54 (674.2) | 29.65 (753) | 3.1 (78.8) 11.7% |
| Width inches (mm) | 6.1 (155) | 9.65 (245) | 3.54 (90) 58.1% |
| Circum. inches (mm) | 83.39 (2118.06) | 93.13 (2365.62) | 9.75 (247.56) 11.7% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 4.82 (122.5) | 0.55 (14) 12.9% |
| Revolutions per mile (km) | 759.82 (472.13) | 680.31 (422.72) | -79.51 (-49.41) -10.5% |
245/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.34 mph (35.95 km/h) |
| 25 mph (40.23 km/h) | 27.92 mph (44.94 km/h) |
| 30 mph (48.28 km/h) | 33.51 mph (53.92 km/h) |
| 35 mph (56.33 km/h) | 39.09 mph (62.91 km/h) |
| 40 mph (64.37 km/h) | 44.68 mph (71.9 km/h) |
| 45 mph (72.42 km/h) | 50.26 mph (80.89 km/h) |
| 50 mph (80.47 km/h) | 55.84 mph (89.87 km/h) |
| 55 mph (88.51 km/h) | 61.43 mph (98.86 km/h) |
| 60 mph (96.56 km/h) | 67.01 mph (107.85 km/h) |
| 65 mph (104.61 km/h) | 72.6 mph (116.83 km/h) |
| 70 mph (112.65 km/h) | 78.18 mph (125.82 km/h) |
| 75 mph (120.7 km/h) | 83.77 mph (134.81 km/h) |
| 80 mph (128.75 km/h) | 89.35 mph (143.8 km/h) |
| 85 mph (136.79 km/h) | 94.93 mph (152.78 km/h) |
| 90 mph (144.84 km/h) | 100.52 mph (161.77 km/h) |
| 95 mph (152.89 km/h) | 106.1 mph (170.76 km/h) |
| 100 mph (160.93 km/h) | 111.69 mph (179.74 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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