Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/30-30 | 325/30-30 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 37.44 (951) | 37.68 (957) | 0.24 (6) 0.6% |
| Width inches (mm) | 12.4 (315) | 12.8 (325) | 0.39 (10) 3.2% |
| Circum. inches (mm) | 117.62 (2987.65) | 118.37 (3006.5) | 0.74 (18.85) 0.6% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 3.84 (97.5) | 0.12 (3) 3.2% |
| Revolutions per mile (km) | 538.66 (334.71) | 535.29 (332.61) | -3.38 (-2.1) -0.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.13 mph (32.39 km/h) |
| 25 mph (40.23 km/h) | 25.16 mph (40.49 km/h) |
| 30 mph (48.28 km/h) | 30.19 mph (48.59 km/h) |
| 35 mph (56.33 km/h) | 35.22 mph (56.68 km/h) |
| 40 mph (64.37 km/h) | 40.25 mph (64.78 km/h) |
| 45 mph (72.42 km/h) | 45.28 mph (72.88 km/h) |
| 50 mph (80.47 km/h) | 50.32 mph (80.98 km/h) |
| 55 mph (88.51 km/h) | 55.35 mph (89.07 km/h) |
| 60 mph (96.56 km/h) | 60.38 mph (97.17 km/h) |
| 65 mph (104.61 km/h) | 65.41 mph (105.27 km/h) |
| 70 mph (112.65 km/h) | 70.44 mph (113.37 km/h) |
| 75 mph (120.7 km/h) | 75.47 mph (121.46 km/h) |
| 80 mph (128.75 km/h) | 80.5 mph (129.56 km/h) |
| 85 mph (136.79 km/h) | 85.54 mph (137.66 km/h) |
| 90 mph (144.84 km/h) | 90.57 mph (145.76 km/h) |
| 95 mph (152.89 km/h) | 95.6 mph (153.85 km/h) |
| 100 mph (160.93 km/h) | 100.63 mph (161.95 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1362 | 1582 | 1704 | 1780 | 1861 | 1919 | 1982 | 2058 | 2162 | 2266 | 2382 | 2475 | 2643 | 2829 | 2974 | 3066 | 3119 | 3310 | 3577 | 4156 |
Better Fuel Economy Factory Ratios Increased Power
