Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 170/55-17 | 185/55-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.36 (618.8) | 25.01 (635.3) | 0.65 (16.5) 2.7% |
| Width inches (mm) | 6.69 (170) | 7.28 (185) | 0.59 (15) 8.8% |
| Circum. inches (mm) | 76.54 (1944.02) | 78.58 (1995.85) | 2.04 (51.84) 2.7% |
| Sidewall Height inches (mm) | 3.68 (93.5) | 4.01 (101.75) | 0.32 (8.25) 8.8% |
| Revolutions per mile (km) | 827.84 (514.4) | 806.34 (501.04) | -21.5 (-13.36) -2.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.53 mph (33.05 km/h) |
| 25 mph (40.23 km/h) | 25.67 mph (41.31 km/h) |
| 30 mph (48.28 km/h) | 30.8 mph (49.57 km/h) |
| 35 mph (56.33 km/h) | 35.93 mph (57.83 km/h) |
| 40 mph (64.37 km/h) | 41.07 mph (66.09 km/h) |
| 45 mph (72.42 km/h) | 46.2 mph (74.35 km/h) |
| 50 mph (80.47 km/h) | 51.33 mph (82.61 km/h) |
| 55 mph (88.51 km/h) | 56.47 mph (90.87 km/h) |
| 60 mph (96.56 km/h) | 61.6 mph (99.14 km/h) |
| 65 mph (104.61 km/h) | 66.73 mph (107.4 km/h) |
| 70 mph (112.65 km/h) | 71.87 mph (115.66 km/h) |
| 75 mph (120.7 km/h) | 77 mph (123.92 km/h) |
| 80 mph (128.75 km/h) | 82.13 mph (132.18 km/h) |
| 85 mph (136.79 km/h) | 87.27 mph (140.44 km/h) |
| 90 mph (144.84 km/h) | 92.4 mph (148.7 km/h) |
| 95 mph (152.89 km/h) | 97.53 mph (156.96 km/h) |
| 100 mph (160.93 km/h) | 102.67 mph (165.23 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2052 | 2384 | 2567 | 2681 | 2803 | 2890 | 2986 | 3100 | 3257 | 3414 | 3589 | 3729 | 3982 | 4261 | 4479 | 4619 | 4698 | 4986 | 5388 | 6261 |
Better Fuel Economy Factory Ratios Increased Power
