Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/55-16 | 115/80-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.28 (565.9) | 22.24 (565) | -0.04 (-0.9) -0.2% |
| Width inches (mm) | 5.71 (145) | 4.53 (115) | -1.18 (-30) -20.7% |
| Circum. inches (mm) | 69.99 (1777.83) | 69.88 (1775) | -0.11 (-2.83) -0.2% |
| Sidewall Height inches (mm) | 3.14 (79.75) | 3.62 (92) | 0.48 (12.25) 15.4% |
| Revolutions per mile (km) | 905.23 (562.48) | 906.67 (563.38) | 1.44 (0.9) 0.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.97 mph (32.14 km/h) |
| 25 mph (40.23 km/h) | 24.96 mph (40.17 km/h) |
| 30 mph (48.28 km/h) | 29.95 mph (48.2 km/h) |
| 35 mph (56.33 km/h) | 34.94 mph (56.24 km/h) |
| 40 mph (64.37 km/h) | 39.94 mph (64.27 km/h) |
| 45 mph (72.42 km/h) | 44.93 mph (72.31 km/h) |
| 50 mph (80.47 km/h) | 49.92 mph (80.34 km/h) |
| 55 mph (88.51 km/h) | 54.91 mph (88.37 km/h) |
| 60 mph (96.56 km/h) | 59.9 mph (96.41 km/h) |
| 65 mph (104.61 km/h) | 64.9 mph (104.44 km/h) |
| 70 mph (112.65 km/h) | 69.89 mph (112.48 km/h) |
| 75 mph (120.7 km/h) | 74.88 mph (120.51 km/h) |
| 80 mph (128.75 km/h) | 79.87 mph (128.54 km/h) |
| 85 mph (136.79 km/h) | 84.86 mph (136.58 km/h) |
| 90 mph (144.84 km/h) | 89.86 mph (144.61 km/h) |
| 95 mph (152.89 km/h) | 94.85 mph (152.64 km/h) |
| 100 mph (160.93 km/h) | 99.84 mph (160.68 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2307 | 2680 | 2887 | 3014 | 3152 | 3250 | 3358 | 3486 | 3662 | 3839 | 4035 | 4192 | 4477 | 4791 | 5037 | 5194 | 5282 | 5606 | 6058 | 7040 |
Better Fuel Economy Factory Ratios Increased Power
