Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/45-20 | 255/45-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.04 (737.5) | 28.04 (712.1) | -1 (-25.4) -3.4% |
| Width inches (mm) | 10.04 (255) | 10.04 (255) | 0 (0) 0% |
| Circum. inches (mm) | 91.22 (2316.92) | 88.08 (2237.13) | -3.14 (-79.8) -3.4% |
| Sidewall Height inches (mm) | 4.52 (114.75) | 4.52 (114.75) | 0 (0) 0% |
| Revolutions per mile (km) | 694.6 (431.61) | 719.38 (447) | 24.78 (15.4) 3.6% |
255/45-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.31 mph (31.08 km/h) |
| 25 mph (40.23 km/h) | 24.14 mph (38.85 km/h) |
| 30 mph (48.28 km/h) | 28.97 mph (46.62 km/h) |
| 35 mph (56.33 km/h) | 33.79 mph (54.39 km/h) |
| 40 mph (64.37 km/h) | 38.62 mph (62.16 km/h) |
| 45 mph (72.42 km/h) | 43.45 mph (69.93 km/h) |
| 50 mph (80.47 km/h) | 48.28 mph (77.7 km/h) |
| 55 mph (88.51 km/h) | 53.11 mph (85.47 km/h) |
| 60 mph (96.56 km/h) | 57.93 mph (93.24 km/h) |
| 65 mph (104.61 km/h) | 62.76 mph (101 km/h) |
| 70 mph (112.65 km/h) | 67.59 mph (108.77 km/h) |
| 75 mph (120.7 km/h) | 72.42 mph (116.54 km/h) |
| 80 mph (128.75 km/h) | 77.24 mph (124.31 km/h) |
| 85 mph (136.79 km/h) | 82.07 mph (132.08 km/h) |
| 90 mph (144.84 km/h) | 86.9 mph (139.85 km/h) |
| 95 mph (152.89 km/h) | 91.73 mph (147.62 km/h) |
| 100 mph (160.93 km/h) | 96.56 mph (155.39 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
