Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 115/80-15 | 380/55-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.24 (565) | 33.46 (849.8) | 11.21 (284.8) 50.4% |
| Width inches (mm) | 4.53 (115) | 14.96 (380) | 10.43 (265) 230.4% |
| Circum. inches (mm) | 69.88 (1775) | 105.11 (2669.73) | 35.23 (894.73) 50.4% |
| Sidewall Height inches (mm) | 3.62 (92) | 8.23 (209) | 4.61 (117) 127.2% |
| Revolutions per mile (km) | 906.67 (563.38) | 602.81 (374.57) | -303.86 (-188.81) -33.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 30.08 mph (48.41 km/h) |
| 25 mph (40.23 km/h) | 37.6 mph (60.51 km/h) |
| 30 mph (48.28 km/h) | 45.12 mph (72.62 km/h) |
| 35 mph (56.33 km/h) | 52.64 mph (84.72 km/h) |
| 40 mph (64.37 km/h) | 60.16 mph (96.82 km/h) |
| 45 mph (72.42 km/h) | 67.68 mph (108.93 km/h) |
| 50 mph (80.47 km/h) | 75.2 mph (121.03 km/h) |
| 55 mph (88.51 km/h) | 82.72 mph (133.13 km/h) |
| 60 mph (96.56 km/h) | 90.24 mph (145.23 km/h) |
| 65 mph (104.61 km/h) | 97.76 mph (157.34 km/h) |
| 70 mph (112.65 km/h) | 105.28 mph (169.44 km/h) |
| 75 mph (120.7 km/h) | 112.81 mph (181.54 km/h) |
| 80 mph (128.75 km/h) | 120.33 mph (193.65 km/h) |
| 85 mph (136.79 km/h) | 127.85 mph (205.75 km/h) |
| 90 mph (144.84 km/h) | 135.37 mph (217.85 km/h) |
| 95 mph (152.89 km/h) | 142.89 mph (229.95 km/h) |
| 100 mph (160.93 km/h) | 150.41 mph (242.06 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1534 | 1782 | 1919 | 2004 | 2095 | 2161 | 2233 | 2317 | 2435 | 2552 | 2683 | 2787 | 2977 | 3186 | 3349 | 3453 | 3512 | 3727 | 4028 | 4680 |
Better Fuel Economy Factory Ratios Increased Power
