Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 170/55-17 | 155/75-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.36 (618.8) | 26.15 (664.3) | 1.79 (45.5) 7.4% |
| Width inches (mm) | 6.69 (170) | 6.1 (155) | -0.59 (-15) -8.8% |
| Circum. inches (mm) | 76.54 (1944.02) | 82.16 (2086.96) | 5.63 (142.94) 7.4% |
| Sidewall Height inches (mm) | 3.68 (93.5) | 4.58 (116.25) | 0.9 (22.75) 24.3% |
| Revolutions per mile (km) | 827.84 (514.4) | 771.14 (479.16) | -56.7 (-35.23) -6.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.47 mph (34.55 km/h) |
| 25 mph (40.23 km/h) | 26.84 mph (43.19 km/h) |
| 30 mph (48.28 km/h) | 32.21 mph (51.83 km/h) |
| 35 mph (56.33 km/h) | 37.57 mph (60.47 km/h) |
| 40 mph (64.37 km/h) | 42.94 mph (69.11 km/h) |
| 45 mph (72.42 km/h) | 48.31 mph (77.75 km/h) |
| 50 mph (80.47 km/h) | 53.68 mph (86.38 km/h) |
| 55 mph (88.51 km/h) | 59.04 mph (95.02 km/h) |
| 60 mph (96.56 km/h) | 64.41 mph (103.66 km/h) |
| 65 mph (104.61 km/h) | 69.78 mph (112.3 km/h) |
| 70 mph (112.65 km/h) | 75.15 mph (120.94 km/h) |
| 75 mph (120.7 km/h) | 80.51 mph (129.58 km/h) |
| 80 mph (128.75 km/h) | 85.88 mph (138.21 km/h) |
| 85 mph (136.79 km/h) | 91.25 mph (146.85 km/h) |
| 90 mph (144.84 km/h) | 96.62 mph (155.49 km/h) |
| 95 mph (152.89 km/h) | 101.99 mph (164.13 km/h) |
| 100 mph (160.93 km/h) | 107.35 mph (172.77 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1962 | 2280 | 2455 | 2564 | 2681 | 2764 | 2856 | 2964 | 3115 | 3265 | 3432 | 3566 | 3808 | 4075 | 4284 | 4418 | 4493 | 4768 | 5152 | 5987 |
Better Fuel Economy Factory Ratios Increased Power
