Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-21 | 375/55-24 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (695.9) | 40.24 (1022.1) | 12.84 (326.2) 46.9% |
| Width inches (mm) | 12.8 (325) | 14.76 (375) | 1.97 (50) 15.4% |
| Circum. inches (mm) | 86.07 (2186.23) | 126.42 (3211.02) | 40.35 (1024.79) 46.9% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 8.12 (206.25) | 4.92 (125) 153.8% |
| Revolutions per mile (km) | 736.13 (457.41) | 501.19 (311.43) | -234.93 (-145.98) -31.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 29.37 mph (47.27 km/h) |
| 25 mph (40.23 km/h) | 36.72 mph (59.09 km/h) |
| 30 mph (48.28 km/h) | 44.06 mph (70.91 km/h) |
| 35 mph (56.33 km/h) | 51.41 mph (82.73 km/h) |
| 40 mph (64.37 km/h) | 58.75 mph (94.55 km/h) |
| 45 mph (72.42 km/h) | 66.09 mph (106.37 km/h) |
| 50 mph (80.47 km/h) | 73.44 mph (118.19 km/h) |
| 55 mph (88.51 km/h) | 80.78 mph (130 km/h) |
| 60 mph (96.56 km/h) | 88.12 mph (141.82 km/h) |
| 65 mph (104.61 km/h) | 95.47 mph (153.64 km/h) |
| 70 mph (112.65 km/h) | 102.81 mph (165.46 km/h) |
| 75 mph (120.7 km/h) | 110.16 mph (177.28 km/h) |
| 80 mph (128.75 km/h) | 117.5 mph (189.1 km/h) |
| 85 mph (136.79 km/h) | 124.84 mph (200.92 km/h) |
| 90 mph (144.84 km/h) | 132.19 mph (212.73 km/h) |
| 95 mph (152.89 km/h) | 139.53 mph (224.55 km/h) |
| 100 mph (160.93 km/h) | 146.87 mph (236.37 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1275 | 1482 | 1596 | 1666 | 1742 | 1796 | 1856 | 1927 | 2024 | 2122 | 2231 | 2318 | 2475 | 2649 | 2784 | 2871 | 2920 | 3099 | 3349 | 3891 |
Better Fuel Economy Factory Ratios Increased Power
