Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/45-17 | 325/50-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.52 (724.3) | 27.8 (706) | -0.72 (-18.3) -2.5% |
| Width inches (mm) | 12.8 (325) | 12.8 (325) | 0 (0) 0% |
| Circum. inches (mm) | 89.58 (2275.46) | 87.32 (2217.96) | -2.26 (-57.49) -2.5% |
| Sidewall Height inches (mm) | 5.76 (146.25) | 6.4 (162.5) | 0.64 (16.25) 11.1% |
| Revolutions per mile (km) | 707.26 (439.47) | 725.6 (450.86) | 18.33 (11.39) 2.6% |
325/50-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.49 mph (31.37 km/h) |
| 25 mph (40.23 km/h) | 24.37 mph (39.22 km/h) |
| 30 mph (48.28 km/h) | 29.24 mph (47.06 km/h) |
| 35 mph (56.33 km/h) | 34.12 mph (54.9 km/h) |
| 40 mph (64.37 km/h) | 38.99 mph (62.75 km/h) |
| 45 mph (72.42 km/h) | 43.86 mph (70.59 km/h) |
| 50 mph (80.47 km/h) | 48.74 mph (78.43 km/h) |
| 55 mph (88.51 km/h) | 53.61 mph (86.28 km/h) |
| 60 mph (96.56 km/h) | 58.48 mph (94.12 km/h) |
| 65 mph (104.61 km/h) | 63.36 mph (101.96 km/h) |
| 70 mph (112.65 km/h) | 68.23 mph (109.81 km/h) |
| 75 mph (120.7 km/h) | 73.11 mph (117.65 km/h) |
| 80 mph (128.75 km/h) | 77.98 mph (125.49 km/h) |
| 85 mph (136.79 km/h) | 82.85 mph (133.34 km/h) |
| 90 mph (144.84 km/h) | 87.73 mph (141.18 km/h) |
| 95 mph (152.89 km/h) | 92.6 mph (149.03 km/h) |
| 100 mph (160.93 km/h) | 97.47 mph (156.87 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 |
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