Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/70-16 | 380/75-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.91 (861.4) | 38.44 (976.4) | 4.53 (115) 13.4% |
| Width inches (mm) | 12.8 (325) | 14.96 (380) | 2.17 (55) 16.9% |
| Circum. inches (mm) | 106.54 (2706.17) | 120.77 (3067.45) | 14.22 (361.28) 13.4% |
| Sidewall Height inches (mm) | 8.96 (227.5) | 11.22 (285) | 2.26 (57.5) 25.3% |
| Revolutions per mile (km) | 594.69 (369.53) | 524.65 (326) | -70.04 (-43.52) -11.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.67 mph (36.48 km/h) |
| 25 mph (40.23 km/h) | 28.34 mph (45.61 km/h) |
| 30 mph (48.28 km/h) | 34.01 mph (54.73 km/h) |
| 35 mph (56.33 km/h) | 39.67 mph (63.85 km/h) |
| 40 mph (64.37 km/h) | 45.34 mph (72.97 km/h) |
| 45 mph (72.42 km/h) | 51.01 mph (82.09 km/h) |
| 50 mph (80.47 km/h) | 56.68 mph (91.21 km/h) |
| 55 mph (88.51 km/h) | 62.34 mph (100.33 km/h) |
| 60 mph (96.56 km/h) | 68.01 mph (109.45 km/h) |
| 65 mph (104.61 km/h) | 73.68 mph (118.57 km/h) |
| 70 mph (112.65 km/h) | 79.35 mph (127.69 km/h) |
| 75 mph (120.7 km/h) | 85.01 mph (136.82 km/h) |
| 80 mph (128.75 km/h) | 90.68 mph (145.94 km/h) |
| 85 mph (136.79 km/h) | 96.35 mph (155.06 km/h) |
| 90 mph (144.84 km/h) | 102.02 mph (164.18 km/h) |
| 95 mph (152.89 km/h) | 107.68 mph (173.3 km/h) |
| 100 mph (160.93 km/h) | 113.35 mph (182.42 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1335 | 1551 | 1670 | 1744 | 1824 | 1881 | 1943 | 2017 | 2119 | 2221 | 2335 | 2426 | 2591 | 2773 | 2915 | 3005 | 3057 | 3244 | 3505 | 4074 |
Better Fuel Economy Factory Ratios Increased Power
