Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/40-20 | 225/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.72 (704) | 27.97 (710.5) | 0.26 (6.5) 0.9% |
| Width inches (mm) | 9.65 (245) | 8.86 (225) | -0.79 (-20) -8.2% |
| Circum. inches (mm) | 87.07 (2211.68) | 87.88 (2232.1) | 0.8 (20.42) 0.9% |
| Sidewall Height inches (mm) | 3.86 (98) | 3.99 (101.25) | 0.13 (3.25) 3.3% |
| Revolutions per mile (km) | 727.66 (452.14) | 721 (448.01) | -6.66 (-4.14) -0.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.18 mph (32.48 km/h) |
| 25 mph (40.23 km/h) | 25.23 mph (40.61 km/h) |
| 30 mph (48.28 km/h) | 30.28 mph (48.73 km/h) |
| 35 mph (56.33 km/h) | 35.32 mph (56.85 km/h) |
| 40 mph (64.37 km/h) | 40.37 mph (64.97 km/h) |
| 45 mph (72.42 km/h) | 45.42 mph (73.09 km/h) |
| 50 mph (80.47 km/h) | 50.46 mph (81.21 km/h) |
| 55 mph (88.51 km/h) | 55.51 mph (89.33 km/h) |
| 60 mph (96.56 km/h) | 60.55 mph (97.45 km/h) |
| 65 mph (104.61 km/h) | 65.6 mph (105.57 km/h) |
| 70 mph (112.65 km/h) | 70.65 mph (113.69 km/h) |
| 75 mph (120.7 km/h) | 75.69 mph (121.82 km/h) |
| 80 mph (128.75 km/h) | 80.74 mph (129.94 km/h) |
| 85 mph (136.79 km/h) | 85.78 mph (138.06 km/h) |
| 90 mph (144.84 km/h) | 90.83 mph (146.18 km/h) |
| 95 mph (152.89 km/h) | 95.88 mph (154.3 km/h) |
| 100 mph (160.93 km/h) | 100.92 mph (162.42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1835 | 2131 | 2295 | 2397 | 2506 | 2584 | 2670 | 2772 | 2912 | 3053 | 3209 | 3334 | 3560 | 3810 | 4005 | 4130 | 4201 | 4458 | 4817 | 5598 |
Better Fuel Economy Factory Ratios Increased Power
