Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/60-15 | 30.5/10.5-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.35 (771) | 30.56 (776.16) | 0.2 (5.16) 0.7% |
| Width inches (mm) | 12.8 (325) | 10.51 (267) | -2.28 (-58) -17.8% |
| Circum. inches (mm) | 95.36 (2422.17) | 96 (2438.38) | 0.64 (16.21) 0.7% |
| Sidewall Height inches (mm) | 7.68 (195) | 7.78 (197.58) | 0.1 (2.58) 1.3% |
| Revolutions per mile (km) | 664.42 (412.85) | 660.01 (410.11) | -4.42 (-2.74) -0.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.13 mph (32.4 km/h) |
| 25 mph (40.23 km/h) | 25.17 mph (40.5 km/h) |
| 30 mph (48.28 km/h) | 30.2 mph (48.6 km/h) |
| 35 mph (56.33 km/h) | 35.23 mph (56.7 km/h) |
| 40 mph (64.37 km/h) | 40.27 mph (64.8 km/h) |
| 45 mph (72.42 km/h) | 45.3 mph (72.91 km/h) |
| 50 mph (80.47 km/h) | 50.33 mph (81.01 km/h) |
| 55 mph (88.51 km/h) | 55.37 mph (89.11 km/h) |
| 60 mph (96.56 km/h) | 60.4 mph (97.21 km/h) |
| 65 mph (104.61 km/h) | 65.44 mph (105.31 km/h) |
| 70 mph (112.65 km/h) | 70.47 mph (113.41 km/h) |
| 75 mph (120.7 km/h) | 75.5 mph (121.51 km/h) |
| 80 mph (128.75 km/h) | 80.54 mph (129.61 km/h) |
| 85 mph (136.79 km/h) | 85.57 mph (137.71 km/h) |
| 90 mph (144.84 km/h) | 90.6 mph (145.81 km/h) |
| 95 mph (152.89 km/h) | 95.64 mph (153.91 km/h) |
| 100 mph (160.93 km/h) | 100.67 mph (162.01 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1680 | 1951 | 2101 | 2194 | 2294 | 2366 | 2444 | 2537 | 2666 | 2795 | 2937 | 3052 | 3259 | 3488 | 3667 | 3781 | 3845 | 4081 | 4410 | 5125 |
Better Fuel Economy Factory Ratios Increased Power
