Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 170/55-17 | 170/45-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.36 (618.8) | 23.02 (584.8) | -1.34 (-34) -5.5% |
| Width inches (mm) | 6.69 (170) | 6.69 (170) | 0 (0) 0% |
| Circum. inches (mm) | 76.54 (1944.02) | 72.33 (1837.2) | -4.21 (-106.81) -5.5% |
| Sidewall Height inches (mm) | 3.68 (93.5) | 3.01 (76.5) | -0.67 (-17) -18.2% |
| Revolutions per mile (km) | 827.84 (514.4) | 875.97 (544.3) | 48.13 (29.91) 5.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.9 mph (30.42 km/h) |
| 25 mph (40.23 km/h) | 23.63 mph (38.02 km/h) |
| 30 mph (48.28 km/h) | 28.35 mph (45.63 km/h) |
| 35 mph (56.33 km/h) | 33.08 mph (53.23 km/h) |
| 40 mph (64.37 km/h) | 37.8 mph (60.84 km/h) |
| 45 mph (72.42 km/h) | 42.53 mph (68.44 km/h) |
| 50 mph (80.47 km/h) | 47.25 mph (76.05 km/h) |
| 55 mph (88.51 km/h) | 51.98 mph (83.65 km/h) |
| 60 mph (96.56 km/h) | 56.7 mph (91.26 km/h) |
| 65 mph (104.61 km/h) | 61.43 mph (98.86 km/h) |
| 70 mph (112.65 km/h) | 66.15 mph (106.46 km/h) |
| 75 mph (120.7 km/h) | 70.88 mph (114.07 km/h) |
| 80 mph (128.75 km/h) | 75.6 mph (121.67 km/h) |
| 85 mph (136.79 km/h) | 80.33 mph (129.28 km/h) |
| 90 mph (144.84 km/h) | 85.05 mph (136.88 km/h) |
| 95 mph (152.89 km/h) | 89.78 mph (144.49 km/h) |
| 100 mph (160.93 km/h) | 94.51 mph (152.09 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2229 | 2590 | 2789 | 2912 | 3045 | 3140 | 3244 | 3367 | 3538 | 3709 | 3899 | 4050 | 4326 | 4629 | 4866 | 5018 | 5103 | 5416 | 5853 | 6801 |
Better Fuel Economy Factory Ratios Increased Power
