Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-21 | 245/45-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.97 (735.9) | 27.68 (703.1) | -1.29 (-32.8) -4.5% |
| Width inches (mm) | 8.86 (225) | 9.65 (245) | 0.79 (20) 8.9% |
| Circum. inches (mm) | 91.02 (2311.9) | 86.96 (2208.85) | -4.06 (-103.04) -4.5% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 4.34 (110.25) | 0.35 (9) 8.9% |
| Revolutions per mile (km) | 696.11 (432.54) | 728.59 (452.72) | 32.47 (20.18) 4.7% |
245/45-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.11 mph (30.75 km/h) |
| 25 mph (40.23 km/h) | 23.89 mph (38.44 km/h) |
| 30 mph (48.28 km/h) | 28.66 mph (46.13 km/h) |
| 35 mph (56.33 km/h) | 33.44 mph (53.82 km/h) |
| 40 mph (64.37 km/h) | 38.22 mph (61.5 km/h) |
| 45 mph (72.42 km/h) | 42.99 mph (69.19 km/h) |
| 50 mph (80.47 km/h) | 47.77 mph (76.88 km/h) |
| 55 mph (88.51 km/h) | 52.55 mph (84.57 km/h) |
| 60 mph (96.56 km/h) | 57.33 mph (92.26 km/h) |
| 65 mph (104.61 km/h) | 62.1 mph (99.95 km/h) |
| 70 mph (112.65 km/h) | 66.88 mph (107.63 km/h) |
| 75 mph (120.7 km/h) | 71.66 mph (115.32 km/h) |
| 80 mph (128.75 km/h) | 76.43 mph (123.01 km/h) |
| 85 mph (136.79 km/h) | 81.21 mph (130.7 km/h) |
| 90 mph (144.84 km/h) | 85.99 mph (138.39 km/h) |
| 95 mph (152.89 km/h) | 90.77 mph (146.07 km/h) |
| 100 mph (160.93 km/h) | 95.54 mph (153.76 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1854 | 2154 | 2320 | 2422 | 2533 | 2612 | 2698 | 2801 | 2943 | 3085 | 3243 | 3369 | 3598 | 3850 | 4047 | 4174 | 4245 | 4505 | 4868 | 5657 |
Better Fuel Economy Factory Ratios Increased Power
