Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-21 | 425/95-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (695.9) | 51.79 (1315.5) | 24.39 (619.6) 89% |
| Width inches (mm) | 12.8 (325) | 16.73 (425) | 3.94 (100) 30.8% |
| Circum. inches (mm) | 86.07 (2186.23) | 162.71 (4132.77) | 76.64 (1946.53) 89% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 15.9 (403.75) | 12.7 (322.5) 396.9% |
| Revolutions per mile (km) | 736.13 (457.41) | 389.41 (241.97) | -346.72 (-215.44) -47.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 37.81 mph (60.84 km/h) |
| 25 mph (40.23 km/h) | 47.26 mph (76.06 km/h) |
| 30 mph (48.28 km/h) | 56.71 mph (91.27 km/h) |
| 35 mph (56.33 km/h) | 66.16 mph (106.48 km/h) |
| 40 mph (64.37 km/h) | 75.61 mph (121.69 km/h) |
| 45 mph (72.42 km/h) | 85.07 mph (136.9 km/h) |
| 50 mph (80.47 km/h) | 94.52 mph (152.11 km/h) |
| 55 mph (88.51 km/h) | 103.97 mph (167.32 km/h) |
| 60 mph (96.56 km/h) | 113.42 mph (182.53 km/h) |
| 65 mph (104.61 km/h) | 122.87 mph (197.75 km/h) |
| 70 mph (112.65 km/h) | 132.33 mph (212.96 km/h) |
| 75 mph (120.7 km/h) | 141.78 mph (228.17 km/h) |
| 80 mph (128.75 km/h) | 151.23 mph (243.38 km/h) |
| 85 mph (136.79 km/h) | 160.68 mph (258.59 km/h) |
| 90 mph (144.84 km/h) | 170.13 mph (273.8 km/h) |
| 95 mph (152.89 km/h) | 179.58 mph (289.01 km/h) |
| 100 mph (160.93 km/h) | 189.04 mph (304.22 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
