Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-21 | 425/20-22 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (695.9) | 28.69 (728.8) | 1.3 (32.9) 4.7% |
| Width inches (mm) | 12.8 (325) | 16.73 (425) | 3.94 (100) 30.8% |
| Circum. inches (mm) | 86.07 (2186.23) | 90.14 (2289.59) | 4.07 (103.36) 4.7% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 3.35 (85) | 0.15 (3.75) 4.6% |
| Revolutions per mile (km) | 736.13 (457.41) | 702.9 (436.76) | -33.23 (-20.65) -4.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.95 mph (33.71 km/h) |
| 25 mph (40.23 km/h) | 26.18 mph (42.14 km/h) |
| 30 mph (48.28 km/h) | 31.42 mph (50.56 km/h) |
| 35 mph (56.33 km/h) | 36.65 mph (58.99 km/h) |
| 40 mph (64.37 km/h) | 41.89 mph (67.42 km/h) |
| 45 mph (72.42 km/h) | 47.13 mph (75.84 km/h) |
| 50 mph (80.47 km/h) | 52.36 mph (84.27 km/h) |
| 55 mph (88.51 km/h) | 57.6 mph (92.7 km/h) |
| 60 mph (96.56 km/h) | 62.84 mph (101.13 km/h) |
| 65 mph (104.61 km/h) | 68.07 mph (109.55 km/h) |
| 70 mph (112.65 km/h) | 73.31 mph (117.98 km/h) |
| 75 mph (120.7 km/h) | 78.55 mph (126.41 km/h) |
| 80 mph (128.75 km/h) | 83.78 mph (134.83 km/h) |
| 85 mph (136.79 km/h) | 89.02 mph (143.26 km/h) |
| 90 mph (144.84 km/h) | 94.25 mph (151.69 km/h) |
| 95 mph (152.89 km/h) | 99.49 mph (160.12 km/h) |
| 100 mph (160.93 km/h) | 104.73 mph (168.54 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1789 | 2078 | 2238 | 2337 | 2443 | 2519 | 2603 | 2702 | 2839 | 2976 | 3128 | 3250 | 3471 | 3714 | 3905 | 4027 | 4095 | 4346 | 4696 | 5458 |
Better Fuel Economy Factory Ratios Increased Power
