Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 250/40-18 | 245/40-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.87 (657.2) | 26.72 (678.6) | 0.84 (21.4) 3.3% |
| Width inches (mm) | 9.84 (250) | 9.65 (245) | -0.2 (-5) -2% |
| Circum. inches (mm) | 81.29 (2064.65) | 83.93 (2131.88) | 2.65 (67.23) 3.3% |
| Sidewall Height inches (mm) | 3.94 (100) | 3.86 (98) | -0.08 (-2) -2% |
| Revolutions per mile (km) | 779.47 (484.34) | 754.89 (469.07) | -24.58 (-15.27) -3.2% |
245/40-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.65 mph (33.24 km/h) |
| 25 mph (40.23 km/h) | 25.81 mph (41.54 km/h) |
| 30 mph (48.28 km/h) | 30.98 mph (49.85 km/h) |
| 35 mph (56.33 km/h) | 36.14 mph (58.16 km/h) |
| 40 mph (64.37 km/h) | 41.3 mph (66.47 km/h) |
| 45 mph (72.42 km/h) | 46.47 mph (74.78 km/h) |
| 50 mph (80.47 km/h) | 51.63 mph (83.09 km/h) |
| 55 mph (88.51 km/h) | 56.79 mph (91.4 km/h) |
| 60 mph (96.56 km/h) | 61.95 mph (99.71 km/h) |
| 65 mph (104.61 km/h) | 67.12 mph (108.01 km/h) |
| 70 mph (112.65 km/h) | 72.28 mph (116.32 km/h) |
| 75 mph (120.7 km/h) | 77.44 mph (124.63 km/h) |
| 80 mph (128.75 km/h) | 82.6 mph (132.94 km/h) |
| 85 mph (136.79 km/h) | 87.77 mph (141.25 km/h) |
| 90 mph (144.84 km/h) | 92.93 mph (149.56 km/h) |
| 95 mph (152.89 km/h) | 98.09 mph (157.87 km/h) |
| 100 mph (160.93 km/h) | 103.26 mph (166.18 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1921 | 2232 | 2403 | 2510 | 2624 | 2706 | 2796 | 2902 | 3049 | 3196 | 3360 | 3491 | 3728 | 3989 | 4194 | 4324 | 4398 | 4668 | 5044 | 5861 |
Better Fuel Economy Factory Ratios Increased Power
