Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 315/35-17 | 325/50-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.68 (652.3) | 27.8 (706) | 2.11 (53.7) 8.2% |
| Width inches (mm) | 12.4 (315) | 12.8 (325) | 0.39 (10) 3.2% |
| Circum. inches (mm) | 80.68 (2049.26) | 87.32 (2217.96) | 6.64 (168.7) 8.2% |
| Sidewall Height inches (mm) | 4.34 (110.25) | 6.4 (162.5) | 2.06 (52.25) 47.4% |
| Revolutions per mile (km) | 785.33 (487.98) | 725.6 (450.86) | -59.73 (-37.12) -7.6% |
325/50-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.65 mph (34.84 km/h) |
| 25 mph (40.23 km/h) | 27.06 mph (43.55 km/h) |
| 30 mph (48.28 km/h) | 32.47 mph (52.26 km/h) |
| 35 mph (56.33 km/h) | 37.88 mph (60.96 km/h) |
| 40 mph (64.37 km/h) | 43.29 mph (69.67 km/h) |
| 45 mph (72.42 km/h) | 48.7 mph (78.38 km/h) |
| 50 mph (80.47 km/h) | 54.12 mph (87.09 km/h) |
| 55 mph (88.51 km/h) | 59.53 mph (95.8 km/h) |
| 60 mph (96.56 km/h) | 64.94 mph (104.51 km/h) |
| 65 mph (104.61 km/h) | 70.35 mph (113.22 km/h) |
| 70 mph (112.65 km/h) | 75.76 mph (121.93 km/h) |
| 75 mph (120.7 km/h) | 81.17 mph (130.64 km/h) |
| 80 mph (128.75 km/h) | 86.59 mph (139.35 km/h) |
| 85 mph (136.79 km/h) | 92 mph (148.06 km/h) |
| 90 mph (144.84 km/h) | 97.41 mph (156.77 km/h) |
| 95 mph (152.89 km/h) | 102.82 mph (165.47 km/h) |
| 100 mph (160.93 km/h) | 108.23 mph (174.18 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1847 | 2145 | 2310 | 2412 | 2522 | 2601 | 2687 | 2789 | 2931 | 3072 | 3229 | 3355 | 3583 | 3834 | 4031 | 4157 | 4227 | 4487 | 4848 | 5634 |
Better Fuel Economy Factory Ratios Increased Power
