Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/30-21 | 245/45-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.73 (704.4) | 27.68 (703.1) | -0.05 (-1.3) -0.2% |
| Width inches (mm) | 11.22 (285) | 9.65 (245) | -1.57 (-40) -14% |
| Circum. inches (mm) | 87.12 (2212.94) | 86.96 (2208.85) | -0.16 (-4.08) -0.2% |
| Sidewall Height inches (mm) | 3.37 (85.5) | 4.34 (110.25) | 0.97 (24.75) 28.9% |
| Revolutions per mile (km) | 727.24 (451.89) | 728.59 (452.72) | 1.34 (0.84) 0.2% |
245/45-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.96 mph (32.13 km/h) |
| 25 mph (40.23 km/h) | 24.95 mph (40.16 km/h) |
| 30 mph (48.28 km/h) | 29.94 mph (48.19 km/h) |
| 35 mph (56.33 km/h) | 34.94 mph (56.22 km/h) |
| 40 mph (64.37 km/h) | 39.93 mph (64.26 km/h) |
| 45 mph (72.42 km/h) | 44.92 mph (72.29 km/h) |
| 50 mph (80.47 km/h) | 49.91 mph (80.32 km/h) |
| 55 mph (88.51 km/h) | 54.9 mph (88.35 km/h) |
| 60 mph (96.56 km/h) | 59.89 mph (96.38 km/h) |
| 65 mph (104.61 km/h) | 64.88 mph (104.41 km/h) |
| 70 mph (112.65 km/h) | 69.87 mph (112.45 km/h) |
| 75 mph (120.7 km/h) | 74.86 mph (120.48 km/h) |
| 80 mph (128.75 km/h) | 79.85 mph (128.51 km/h) |
| 85 mph (136.79 km/h) | 84.84 mph (136.54 km/h) |
| 90 mph (144.84 km/h) | 89.83 mph (144.57 km/h) |
| 95 mph (152.89 km/h) | 94.82 mph (152.61 km/h) |
| 100 mph (160.93 km/h) | 99.82 mph (160.64 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
