Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-21 | 375/45-24 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (695.9) | 37.29 (947.1) | 9.89 (251.2) 36.1% |
| Width inches (mm) | 12.8 (325) | 14.76 (375) | 1.97 (50) 15.4% |
| Circum. inches (mm) | 86.07 (2186.23) | 117.14 (2975.4) | 31.07 (789.17) 36.1% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 6.64 (168.75) | 3.44 (87.5) 107.7% |
| Revolutions per mile (km) | 736.13 (457.41) | 540.88 (336.09) | -195.24 (-121.32) -26.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.22 mph (43.81 km/h) |
| 25 mph (40.23 km/h) | 34.02 mph (54.76 km/h) |
| 30 mph (48.28 km/h) | 40.83 mph (65.71 km/h) |
| 35 mph (56.33 km/h) | 47.63 mph (76.66 km/h) |
| 40 mph (64.37 km/h) | 54.44 mph (87.61 km/h) |
| 45 mph (72.42 km/h) | 61.24 mph (98.56 km/h) |
| 50 mph (80.47 km/h) | 68.05 mph (109.51 km/h) |
| 55 mph (88.51 km/h) | 74.85 mph (120.47 km/h) |
| 60 mph (96.56 km/h) | 81.66 mph (131.42 km/h) |
| 65 mph (104.61 km/h) | 88.46 mph (142.37 km/h) |
| 70 mph (112.65 km/h) | 95.27 mph (153.32 km/h) |
| 75 mph (120.7 km/h) | 102.07 mph (164.27 km/h) |
| 80 mph (128.75 km/h) | 108.88 mph (175.22 km/h) |
| 85 mph (136.79 km/h) | 115.68 mph (186.17 km/h) |
| 90 mph (144.84 km/h) | 122.49 mph (197.12 km/h) |
| 95 mph (152.89 km/h) | 129.29 mph (208.08 km/h) |
| 100 mph (160.93 km/h) | 136.1 mph (219.03 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1376 | 1599 | 1722 | 1798 | 1880 | 1939 | 2003 | 2079 | 2185 | 2290 | 2407 | 2501 | 2671 | 2858 | 3005 | 3098 | 3151 | 3344 | 3614 | 4200 |
Better Fuel Economy Factory Ratios Increased Power
