Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/40-20 | 245/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.66 (728) | 29.65 (753) | 0.98 (25) 3.4% |
| Width inches (mm) | 10.83 (275) | 9.65 (245) | -1.18 (-30) -10.9% |
| Circum. inches (mm) | 90.04 (2287.08) | 93.13 (2365.62) | 3.09 (78.54) 3.4% |
| Sidewall Height inches (mm) | 4.33 (110) | 4.82 (122.5) | 0.49 (12.5) 11.4% |
| Revolutions per mile (km) | 703.67 (437.24) | 680.31 (422.72) | -23.36 (-14.52) -3.3% |
245/50-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.69 mph (33.29 km/h) |
| 25 mph (40.23 km/h) | 25.86 mph (41.62 km/h) |
| 30 mph (48.28 km/h) | 31.03 mph (49.94 km/h) |
| 35 mph (56.33 km/h) | 36.2 mph (58.26 km/h) |
| 40 mph (64.37 km/h) | 41.37 mph (66.58 km/h) |
| 45 mph (72.42 km/h) | 46.55 mph (74.91 km/h) |
| 50 mph (80.47 km/h) | 51.72 mph (83.23 km/h) |
| 55 mph (88.51 km/h) | 56.89 mph (91.55 km/h) |
| 60 mph (96.56 km/h) | 62.06 mph (99.88 km/h) |
| 65 mph (104.61 km/h) | 67.23 mph (108.2 km/h) |
| 70 mph (112.65 km/h) | 72.4 mph (116.52 km/h) |
| 75 mph (120.7 km/h) | 77.58 mph (124.85 km/h) |
| 80 mph (128.75 km/h) | 82.75 mph (133.17 km/h) |
| 85 mph (136.79 km/h) | 87.92 mph (141.49 km/h) |
| 90 mph (144.84 km/h) | 93.09 mph (149.82 km/h) |
| 95 mph (152.89 km/h) | 98.26 mph (158.14 km/h) |
| 100 mph (160.93 km/h) | 103.43 mph (166.46 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 |
Better Fuel Economy Factory Ratios Increased Power
