Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/55-15 | 175/40-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.71 (551.5) | 22.51 (571.8) | 0.8 (20.3) 3.7% |
| Width inches (mm) | 6.1 (155) | 6.89 (175) | 0.79 (20) 12.9% |
| Circum. inches (mm) | 68.21 (1732.59) | 70.72 (1796.36) | 2.51 (63.77) 3.7% |
| Sidewall Height inches (mm) | 3.36 (85.25) | 2.76 (70) | -0.6 (-15.25) -17.9% |
| Revolutions per mile (km) | 928.87 (577.17) | 895.89 (556.68) | -32.98 (-20.49) -3.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.74 mph (33.37 km/h) |
| 25 mph (40.23 km/h) | 25.92 mph (41.71 km/h) |
| 30 mph (48.28 km/h) | 31.1 mph (50.06 km/h) |
| 35 mph (56.33 km/h) | 36.29 mph (58.4 km/h) |
| 40 mph (64.37 km/h) | 41.47 mph (66.74 km/h) |
| 45 mph (72.42 km/h) | 46.66 mph (75.09 km/h) |
| 50 mph (80.47 km/h) | 51.84 mph (83.43 km/h) |
| 55 mph (88.51 km/h) | 57.02 mph (91.77 km/h) |
| 60 mph (96.56 km/h) | 62.21 mph (100.12 km/h) |
| 65 mph (104.61 km/h) | 67.39 mph (108.46 km/h) |
| 70 mph (112.65 km/h) | 72.58 mph (116.8 km/h) |
| 75 mph (120.7 km/h) | 77.76 mph (125.14 km/h) |
| 80 mph (128.75 km/h) | 82.94 mph (133.49 km/h) |
| 85 mph (136.79 km/h) | 88.13 mph (141.83 km/h) |
| 90 mph (144.84 km/h) | 93.31 mph (150.17 km/h) |
| 95 mph (152.89 km/h) | 98.5 mph (158.52 km/h) |
| 100 mph (160.93 km/h) | 103.68 mph (166.86 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2280 | 2649 | 2852 | 2978 | 3114 | 3211 | 3318 | 3444 | 3619 | 3793 | 3987 | 4143 | 4424 | 4734 | 4977 | 5132 | 5219 | 5540 | 5986 | 6956 |
Better Fuel Economy Factory Ratios Increased Power
