Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/80-15 | 365/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.47 (901) | 33.68 (855.5) | -1.79 (-45.5) -5% |
| Width inches (mm) | 12.8 (325) | 14.37 (365) | 1.57 (40) 12.3% |
| Circum. inches (mm) | 111.44 (2830.57) | 105.81 (2687.63) | -5.63 (-142.94) -5% |
| Sidewall Height inches (mm) | 10.24 (260) | 9.34 (237.25) | -0.9 (-22.75) -8.8% |
| Revolutions per mile (km) | 568.56 (353.28) | 598.8 (372.07) | 30.24 (18.79) 5.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.99 mph (30.56 km/h) |
| 25 mph (40.23 km/h) | 23.74 mph (38.2 km/h) |
| 30 mph (48.28 km/h) | 28.49 mph (45.84 km/h) |
| 35 mph (56.33 km/h) | 33.23 mph (53.48 km/h) |
| 40 mph (64.37 km/h) | 37.98 mph (61.12 km/h) |
| 45 mph (72.42 km/h) | 42.73 mph (68.76 km/h) |
| 50 mph (80.47 km/h) | 47.48 mph (76.4 km/h) |
| 55 mph (88.51 km/h) | 52.22 mph (84.04 km/h) |
| 60 mph (96.56 km/h) | 56.97 mph (91.68 km/h) |
| 65 mph (104.61 km/h) | 61.72 mph (99.32 km/h) |
| 70 mph (112.65 km/h) | 66.47 mph (106.97 km/h) |
| 75 mph (120.7 km/h) | 71.21 mph (114.61 km/h) |
| 80 mph (128.75 km/h) | 75.96 mph (122.25 km/h) |
| 85 mph (136.79 km/h) | 80.71 mph (129.89 km/h) |
| 90 mph (144.84 km/h) | 85.46 mph (137.53 km/h) |
| 95 mph (152.89 km/h) | 90.2 mph (145.17 km/h) |
| 100 mph (160.93 km/h) | 94.95 mph (152.81 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1524 | 1770 | 1906 | 1991 | 2081 | 2146 | 2218 | 2302 | 2419 | 2535 | 2665 | 2769 | 2957 | 3164 | 3326 | 3430 | 3489 | 3703 | 4001 | 4649 |
Better Fuel Economy Factory Ratios Increased Power
