Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/45-16 | 325/30-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.16 (689.9) | 25.68 (652.2) | -1.48 (-37.7) -5.5% |
| Width inches (mm) | 12.4 (315) | 12.8 (325) | 0.39 (10) 3.2% |
| Circum. inches (mm) | 85.33 (2167.38) | 80.67 (2048.95) | -4.66 (-118.44) -5.5% |
| Sidewall Height inches (mm) | 5.58 (141.75) | 3.84 (97.5) | -1.74 (-44.25) -31.2% |
| Revolutions per mile (km) | 742.53 (461.38) | 785.45 (488.05) | 42.92 (26.67) 5.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.91 mph (30.43 km/h) |
| 25 mph (40.23 km/h) | 23.63 mph (38.04 km/h) |
| 30 mph (48.28 km/h) | 28.36 mph (45.64 km/h) |
| 35 mph (56.33 km/h) | 33.09 mph (53.25 km/h) |
| 40 mph (64.37 km/h) | 37.81 mph (60.86 km/h) |
| 45 mph (72.42 km/h) | 42.54 mph (68.46 km/h) |
| 50 mph (80.47 km/h) | 47.27 mph (76.07 km/h) |
| 55 mph (88.51 km/h) | 51.99 mph (83.68 km/h) |
| 60 mph (96.56 km/h) | 56.72 mph (91.28 km/h) |
| 65 mph (104.61 km/h) | 61.45 mph (98.89 km/h) |
| 70 mph (112.65 km/h) | 66.17 mph (106.5 km/h) |
| 75 mph (120.7 km/h) | 70.9 mph (114.11 km/h) |
| 80 mph (128.75 km/h) | 75.63 mph (121.71 km/h) |
| 85 mph (136.79 km/h) | 80.36 mph (129.32 km/h) |
| 90 mph (144.84 km/h) | 85.08 mph (136.93 km/h) |
| 95 mph (152.89 km/h) | 89.81 mph (144.53 km/h) |
| 100 mph (160.93 km/h) | 94.54 mph (152.14 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1999 | 2322 | 2501 | 2611 | 2730 | 2815 | 2909 | 3019 | 3173 | 3326 | 3496 | 3632 | 3879 | 4151 | 4363 | 4499 | 4576 | 4857 | 5248 | 6099 |
Better Fuel Economy Factory Ratios Increased Power
