Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/60-15 | 325/65-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.35 (771) | 31.63 (803.5) | 1.28 (32.5) 4.2% |
| Width inches (mm) | 12.8 (325) | 12.8 (325) | 0 (0) 0% |
| Circum. inches (mm) | 95.36 (2422.17) | 99.38 (2524.27) | 4.02 (102.1) 4.2% |
| Sidewall Height inches (mm) | 7.68 (195) | 8.32 (211.25) | 0.64 (16.25) 8.3% |
| Revolutions per mile (km) | 664.42 (412.85) | 637.55 (396.15) | -26.87 (-16.7) -4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.84 mph (33.54 km/h) |
| 25 mph (40.23 km/h) | 26.05 mph (41.93 km/h) |
| 30 mph (48.28 km/h) | 31.26 mph (50.32 km/h) |
| 35 mph (56.33 km/h) | 36.48 mph (58.7 km/h) |
| 40 mph (64.37 km/h) | 41.69 mph (67.09 km/h) |
| 45 mph (72.42 km/h) | 46.9 mph (75.47 km/h) |
| 50 mph (80.47 km/h) | 52.11 mph (83.86 km/h) |
| 55 mph (88.51 km/h) | 57.32 mph (92.25 km/h) |
| 60 mph (96.56 km/h) | 62.53 mph (100.63 km/h) |
| 65 mph (104.61 km/h) | 67.74 mph (109.02 km/h) |
| 70 mph (112.65 km/h) | 72.95 mph (117.4 km/h) |
| 75 mph (120.7 km/h) | 78.16 mph (125.79 km/h) |
| 80 mph (128.75 km/h) | 83.37 mph (134.17 km/h) |
| 85 mph (136.79 km/h) | 88.58 mph (142.56 km/h) |
| 90 mph (144.84 km/h) | 93.79 mph (150.95 km/h) |
| 95 mph (152.89 km/h) | 99 mph (159.33 km/h) |
| 100 mph (160.93 km/h) | 104.22 mph (167.72 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1622 | 1885 | 2030 | 2120 | 2216 | 2285 | 2361 | 2451 | 2575 | 2699 | 2838 | 2948 | 3148 | 3369 | 3542 | 3652 | 3714 | 3942 | 4260 | 4950 |
Better Fuel Economy Factory Ratios Increased Power
