Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/45-20 | 245/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.68 (728.5) | 30.61 (777.5) | 1.93 (49) 6.7% |
| Width inches (mm) | 9.65 (245) | 9.65 (245) | 0 (0) 0% |
| Circum. inches (mm) | 90.1 (2288.65) | 96.16 (2442.59) | 6.06 (153.94) 6.7% |
| Sidewall Height inches (mm) | 4.34 (110.25) | 5.31 (134.75) | 0.96 (24.5) 22.2% |
| Revolutions per mile (km) | 703.18 (436.94) | 658.87 (409.4) | -44.32 (-27.54) -6.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.35 mph (34.35 km/h) |
| 25 mph (40.23 km/h) | 26.68 mph (42.94 km/h) |
| 30 mph (48.28 km/h) | 32.02 mph (51.53 km/h) |
| 35 mph (56.33 km/h) | 37.35 mph (60.12 km/h) |
| 40 mph (64.37 km/h) | 42.69 mph (68.7 km/h) |
| 45 mph (72.42 km/h) | 48.03 mph (77.29 km/h) |
| 50 mph (80.47 km/h) | 53.36 mph (85.88 km/h) |
| 55 mph (88.51 km/h) | 58.7 mph (94.47 km/h) |
| 60 mph (96.56 km/h) | 64.04 mph (103.06 km/h) |
| 65 mph (104.61 km/h) | 69.37 mph (111.64 km/h) |
| 70 mph (112.65 km/h) | 74.71 mph (120.23 km/h) |
| 75 mph (120.7 km/h) | 80.04 mph (128.82 km/h) |
| 80 mph (128.75 km/h) | 85.38 mph (137.41 km/h) |
| 85 mph (136.79 km/h) | 90.72 mph (146 km/h) |
| 90 mph (144.84 km/h) | 96.05 mph (154.58 km/h) |
| 95 mph (152.89 km/h) | 101.39 mph (163.17 km/h) |
| 100 mph (160.93 km/h) | 106.73 mph (171.76 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1677 | 1948 | 2098 | 2190 | 2290 | 2362 | 2440 | 2533 | 2661 | 2790 | 2932 | 3047 | 3253 | 3482 | 3660 | 3774 | 3839 | 4074 | 4402 | 5116 |
Better Fuel Economy Factory Ratios Increased Power
