Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/90-17 | 185/56-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.69 (728.8) | 25.16 (639) | -3.54 (-89.8) -12.3% |
| Width inches (mm) | 6.5 (165) | 7.28 (185) | 0.79 (20) 12.1% |
| Circum. inches (mm) | 90.14 (2289.59) | 79.03 (2007.48) | -11.11 (-282.12) -12.3% |
| Sidewall Height inches (mm) | 5.85 (148.5) | 4.08 (103.6) | -1.77 (-44.9) -30.2% |
| Revolutions per mile (km) | 702.9 (436.76) | 801.67 (498.14) | 98.78 (61.38) 14.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.54 mph (28.22 km/h) |
| 25 mph (40.23 km/h) | 21.92 mph (35.28 km/h) |
| 30 mph (48.28 km/h) | 26.3 mph (42.33 km/h) |
| 35 mph (56.33 km/h) | 30.69 mph (49.39 km/h) |
| 40 mph (64.37 km/h) | 35.07 mph (56.44 km/h) |
| 45 mph (72.42 km/h) | 39.46 mph (63.5 km/h) |
| 50 mph (80.47 km/h) | 43.84 mph (70.55 km/h) |
| 55 mph (88.51 km/h) | 48.22 mph (77.61 km/h) |
| 60 mph (96.56 km/h) | 52.61 mph (84.66 km/h) |
| 65 mph (104.61 km/h) | 56.99 mph (91.72 km/h) |
| 70 mph (112.65 km/h) | 61.37 mph (98.77 km/h) |
| 75 mph (120.7 km/h) | 65.76 mph (105.83 km/h) |
| 80 mph (128.75 km/h) | 70.14 mph (112.88 km/h) |
| 85 mph (136.79 km/h) | 74.53 mph (119.94 km/h) |
| 90 mph (144.84 km/h) | 78.91 mph (126.99 km/h) |
| 95 mph (152.89 km/h) | 83.29 mph (134.05 km/h) |
| 100 mph (160.93 km/h) | 87.68 mph (141.1 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2040 | 2370 | 2552 | 2665 | 2787 | 2874 | 2969 | 3082 | 3238 | 3394 | 3568 | 3707 | 3959 | 4236 | 4454 | 4592 | 4671 | 4957 | 5356 | 6225 |
Better Fuel Economy Factory Ratios Increased Power
