Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/25-20 | 425/25-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.41 (645.5) | 28.37 (720.5) | 2.95 (75) 11.6% |
| Width inches (mm) | 10.83 (275) | 16.73 (425) | 5.91 (150) 54.5% |
| Circum. inches (mm) | 79.84 (2027.9) | 89.11 (2263.52) | 9.28 (235.62) 11.6% |
| Sidewall Height inches (mm) | 2.71 (68.75) | 4.18 (106.25) | 1.48 (37.5) 54.5% |
| Revolutions per mile (km) | 793.6 (493.12) | 710.99 (441.79) | -82.61 (-51.33) -10.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.32 mph (35.93 km/h) |
| 25 mph (40.23 km/h) | 27.9 mph (44.91 km/h) |
| 30 mph (48.28 km/h) | 33.49 mph (53.89 km/h) |
| 35 mph (56.33 km/h) | 39.07 mph (62.87 km/h) |
| 40 mph (64.37 km/h) | 44.65 mph (71.85 km/h) |
| 45 mph (72.42 km/h) | 50.23 mph (80.84 km/h) |
| 50 mph (80.47 km/h) | 55.81 mph (89.82 km/h) |
| 55 mph (88.51 km/h) | 61.39 mph (98.8 km/h) |
| 60 mph (96.56 km/h) | 66.97 mph (107.78 km/h) |
| 65 mph (104.61 km/h) | 72.55 mph (116.76 km/h) |
| 70 mph (112.65 km/h) | 78.13 mph (125.74 km/h) |
| 75 mph (120.7 km/h) | 83.71 mph (134.73 km/h) |
| 80 mph (128.75 km/h) | 89.3 mph (143.71 km/h) |
| 85 mph (136.79 km/h) | 94.88 mph (152.69 km/h) |
| 90 mph (144.84 km/h) | 100.46 mph (161.67 km/h) |
| 95 mph (152.89 km/h) | 106.04 mph (170.65 km/h) |
| 100 mph (160.93 km/h) | 111.62 mph (179.63 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1809 | 2102 | 2264 | 2364 | 2471 | 2548 | 2633 | 2733 | 2872 | 3010 | 3164 | 3288 | 3511 | 3757 | 3950 | 4073 | 4142 | 4396 | 4750 | 5520 |
Better Fuel Economy Factory Ratios Increased Power
