Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-20 | 275/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.4 (670.5) | 26.5 (673) | 0.1 (2.5) 0.4% |
| Width inches (mm) | 12.8 (325) | 10.83 (275) | -1.97 (-50) -15.4% |
| Circum. inches (mm) | 82.93 (2106.44) | 83.24 (2114.29) | 0.31 (7.85) 0.4% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 3.25 (82.5) | 0.05 (1.25) 1.5% |
| Revolutions per mile (km) | 764.01 (474.73) | 761.17 (472.97) | -2.84 (-1.76) -0.4% |
275/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.07 mph (32.31 km/h) |
| 25 mph (40.23 km/h) | 25.09 mph (40.38 km/h) |
| 30 mph (48.28 km/h) | 30.11 mph (48.46 km/h) |
| 35 mph (56.33 km/h) | 35.13 mph (56.54 km/h) |
| 40 mph (64.37 km/h) | 40.15 mph (64.61 km/h) |
| 45 mph (72.42 km/h) | 45.17 mph (72.69 km/h) |
| 50 mph (80.47 km/h) | 50.19 mph (80.77 km/h) |
| 55 mph (88.51 km/h) | 55.21 mph (88.84 km/h) |
| 60 mph (96.56 km/h) | 60.22 mph (96.92 km/h) |
| 65 mph (104.61 km/h) | 65.24 mph (105 km/h) |
| 70 mph (112.65 km/h) | 70.26 mph (113.07 km/h) |
| 75 mph (120.7 km/h) | 75.28 mph (121.15 km/h) |
| 80 mph (128.75 km/h) | 80.3 mph (129.23 km/h) |
| 85 mph (136.79 km/h) | 85.32 mph (137.3 km/h) |
| 90 mph (144.84 km/h) | 90.34 mph (145.38 km/h) |
| 95 mph (152.89 km/h) | 95.35 mph (153.46 km/h) |
| 100 mph (160.93 km/h) | 100.37 mph (161.53 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1937 | 2250 | 2423 | 2531 | 2646 | 2728 | 2819 | 2926 | 3075 | 3223 | 3388 | 3520 | 3759 | 4022 | 4229 | 4360 | 4435 | 4707 | 5086 | 5910 |
Better Fuel Economy Factory Ratios Increased Power
