Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/25-20 | 325/45-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.41 (645.5) | 31.52 (800.5) | 6.1 (155) 24% |
| Width inches (mm) | 10.83 (275) | 12.8 (325) | 1.97 (50) 18.2% |
| Circum. inches (mm) | 79.84 (2027.9) | 99.01 (2514.84) | 19.17 (486.95) 24% |
| Sidewall Height inches (mm) | 2.71 (68.75) | 5.76 (146.25) | 3.05 (77.5) 112.7% |
| Revolutions per mile (km) | 793.6 (493.12) | 639.94 (397.64) | -153.66 (-95.48) -19.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.8 mph (39.92 km/h) |
| 25 mph (40.23 km/h) | 31 mph (49.89 km/h) |
| 30 mph (48.28 km/h) | 37.2 mph (59.87 km/h) |
| 35 mph (56.33 km/h) | 43.4 mph (69.85 km/h) |
| 40 mph (64.37 km/h) | 49.6 mph (79.83 km/h) |
| 45 mph (72.42 km/h) | 55.81 mph (89.81 km/h) |
| 50 mph (80.47 km/h) | 62.01 mph (99.79 km/h) |
| 55 mph (88.51 km/h) | 68.21 mph (109.77 km/h) |
| 60 mph (96.56 km/h) | 74.41 mph (119.75 km/h) |
| 65 mph (104.61 km/h) | 80.61 mph (129.73 km/h) |
| 70 mph (112.65 km/h) | 86.81 mph (139.71 km/h) |
| 75 mph (120.7 km/h) | 93.01 mph (149.68 km/h) |
| 80 mph (128.75 km/h) | 99.21 mph (159.66 km/h) |
| 85 mph (136.79 km/h) | 105.41 mph (169.64 km/h) |
| 90 mph (144.84 km/h) | 111.61 mph (179.62 km/h) |
| 95 mph (152.89 km/h) | 117.81 mph (189.6 km/h) |
| 100 mph (160.93 km/h) | 124.01 mph (199.58 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1629 | 1892 | 2037 | 2127 | 2224 | 2294 | 2370 | 2460 | 2585 | 2710 | 2848 | 2959 | 3160 | 3382 | 3555 | 3666 | 3728 | 3957 | 4276 | 4969 |
Better Fuel Economy Factory Ratios Increased Power
