Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-21 | 255/45-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.97 (735.9) | 28.04 (712.1) | -0.94 (-23.8) -3.2% |
| Width inches (mm) | 8.86 (225) | 10.04 (255) | 1.18 (30) 13.3% |
| Circum. inches (mm) | 91.02 (2311.9) | 88.08 (2237.13) | -2.94 (-74.77) -3.2% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 4.52 (114.75) | 0.53 (13.5) 13.3% |
| Revolutions per mile (km) | 696.11 (432.54) | 719.38 (447) | 23.27 (14.46) 3.3% |
255/45-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.35 mph (31.15 km/h) |
| 25 mph (40.23 km/h) | 24.19 mph (38.93 km/h) |
| 30 mph (48.28 km/h) | 29.03 mph (46.72 km/h) |
| 35 mph (56.33 km/h) | 33.87 mph (54.51 km/h) |
| 40 mph (64.37 km/h) | 38.71 mph (62.29 km/h) |
| 45 mph (72.42 km/h) | 43.54 mph (70.08 km/h) |
| 50 mph (80.47 km/h) | 48.38 mph (77.86 km/h) |
| 55 mph (88.51 km/h) | 53.22 mph (85.65 km/h) |
| 60 mph (96.56 km/h) | 58.06 mph (93.44 km/h) |
| 65 mph (104.61 km/h) | 62.9 mph (101.22 km/h) |
| 70 mph (112.65 km/h) | 67.74 mph (109.01 km/h) |
| 75 mph (120.7 km/h) | 72.57 mph (116.8 km/h) |
| 80 mph (128.75 km/h) | 77.41 mph (124.58 km/h) |
| 85 mph (136.79 km/h) | 82.25 mph (132.37 km/h) |
| 90 mph (144.84 km/h) | 87.09 mph (140.16 km/h) |
| 95 mph (152.89 km/h) | 91.93 mph (147.94 km/h) |
| 100 mph (160.93 km/h) | 96.77 mph (155.73 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1831 | 2127 | 2290 | 2392 | 2501 | 2579 | 2664 | 2766 | 2906 | 3046 | 3202 | 3326 | 3552 | 3802 | 3996 | 4121 | 4191 | 4448 | 4807 | 5586 |
Better Fuel Economy Factory Ratios Increased Power
