Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-18 | 245/40-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.97 (659.7) | 26.72 (678.6) | 0.74 (18.9) 2.9% |
| Width inches (mm) | 8.86 (225) | 9.65 (245) | 0.79 (20) 8.9% |
| Circum. inches (mm) | 81.59 (2072.51) | 83.93 (2131.88) | 2.34 (59.38) 2.9% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 3.86 (98) | -0.13 (-3.25) -3.2% |
| Revolutions per mile (km) | 776.52 (482.51) | 754.89 (469.07) | -21.63 (-13.44) -2.8% |
245/40-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.57 mph (33.11 km/h) |
| 25 mph (40.23 km/h) | 25.72 mph (41.39 km/h) |
| 30 mph (48.28 km/h) | 30.86 mph (49.66 km/h) |
| 35 mph (56.33 km/h) | 36 mph (57.94 km/h) |
| 40 mph (64.37 km/h) | 41.15 mph (66.22 km/h) |
| 45 mph (72.42 km/h) | 46.29 mph (74.5 km/h) |
| 50 mph (80.47 km/h) | 51.43 mph (82.77 km/h) |
| 55 mph (88.51 km/h) | 56.58 mph (91.05 km/h) |
| 60 mph (96.56 km/h) | 61.72 mph (99.33 km/h) |
| 65 mph (104.61 km/h) | 66.86 mph (107.6 km/h) |
| 70 mph (112.65 km/h) | 72.01 mph (115.88 km/h) |
| 75 mph (120.7 km/h) | 77.15 mph (124.16 km/h) |
| 80 mph (128.75 km/h) | 82.29 mph (132.44 km/h) |
| 85 mph (136.79 km/h) | 87.44 mph (140.71 km/h) |
| 90 mph (144.84 km/h) | 92.58 mph (148.99 km/h) |
| 95 mph (152.89 km/h) | 97.72 mph (157.27 km/h) |
| 100 mph (160.93 km/h) | 102.86 mph (165.55 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
