Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/55-16 | 175/40-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.58 (598.9) | 20.51 (521) | -3.07 (-77.9) -13% |
| Width inches (mm) | 6.89 (175) | 6.89 (175) | 0 (0) 0% |
| Circum. inches (mm) | 74.07 (1881.5) | 64.44 (1636.77) | -9.64 (-244.73) -13% |
| Sidewall Height inches (mm) | 3.79 (96.25) | 2.76 (70) | -1.03 (-26.25) -27.3% |
| Revolutions per mile (km) | 855.35 (531.49) | 983.24 (610.96) | 127.89 (79.47) 15% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.4 mph (28 km/h) |
| 25 mph (40.23 km/h) | 21.75 mph (35 km/h) |
| 30 mph (48.28 km/h) | 26.1 mph (42 km/h) |
| 35 mph (56.33 km/h) | 30.45 mph (49 km/h) |
| 40 mph (64.37 km/h) | 34.8 mph (56 km/h) |
| 45 mph (72.42 km/h) | 39.15 mph (63 km/h) |
| 50 mph (80.47 km/h) | 43.5 mph (70 km/h) |
| 55 mph (88.51 km/h) | 47.85 mph (77 km/h) |
| 60 mph (96.56 km/h) | 52.2 mph (84 km/h) |
| 65 mph (104.61 km/h) | 56.55 mph (91 km/h) |
| 70 mph (112.65 km/h) | 60.89 mph (98 km/h) |
| 75 mph (120.7 km/h) | 65.24 mph (105 km/h) |
| 80 mph (128.75 km/h) | 69.59 mph (112 km/h) |
| 85 mph (136.79 km/h) | 73.94 mph (119 km/h) |
| 90 mph (144.84 km/h) | 78.29 mph (126 km/h) |
| 95 mph (152.89 km/h) | 82.64 mph (133 km/h) |
| 100 mph (160.93 km/h) | 86.99 mph (140 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
