Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/55-20 | 250/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.04 (788.5) | 28.86 (733) | -2.19 (-55.5) -7% |
| Width inches (mm) | 10.04 (255) | 9.84 (250) | -0.2 (-5) -2% |
| Circum. inches (mm) | 97.53 (2477.15) | 90.66 (2302.79) | -6.86 (-174.36) -7% |
| Sidewall Height inches (mm) | 5.52 (140.25) | 4.43 (112.5) | -1.09 (-27.75) -19.8% |
| Revolutions per mile (km) | 649.68 (403.69) | 698.87 (434.26) | 49.19 (30.57) 7.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.59 mph (29.92 km/h) |
| 25 mph (40.23 km/h) | 23.24 mph (37.4 km/h) |
| 30 mph (48.28 km/h) | 27.89 mph (44.88 km/h) |
| 35 mph (56.33 km/h) | 32.54 mph (52.36 km/h) |
| 40 mph (64.37 km/h) | 37.18 mph (59.84 km/h) |
| 45 mph (72.42 km/h) | 41.83 mph (67.32 km/h) |
| 50 mph (80.47 km/h) | 46.48 mph (74.8 km/h) |
| 55 mph (88.51 km/h) | 51.13 mph (82.28 km/h) |
| 60 mph (96.56 km/h) | 55.78 mph (89.76 km/h) |
| 65 mph (104.61 km/h) | 60.42 mph (97.24 km/h) |
| 70 mph (112.65 km/h) | 65.07 mph (104.72 km/h) |
| 75 mph (120.7 km/h) | 69.72 mph (112.21 km/h) |
| 80 mph (128.75 km/h) | 74.37 mph (119.69 km/h) |
| 85 mph (136.79 km/h) | 79.02 mph (127.17 km/h) |
| 90 mph (144.84 km/h) | 83.67 mph (134.65 km/h) |
| 95 mph (152.89 km/h) | 88.31 mph (142.13 km/h) |
| 100 mph (160.93 km/h) | 92.96 mph (149.61 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1778 | 2066 | 2225 | 2323 | 2429 | 2505 | 2588 | 2687 | 2823 | 2959 | 3110 | 3232 | 3451 | 3693 | 3882 | 4003 | 4072 | 4321 | 4669 | 5426 |
Better Fuel Economy Factory Ratios Increased Power
