Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 170/55-17 | 170/30-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.36 (618.8) | 21.02 (533.8) | -3.35 (-85) -13.7% |
| Width inches (mm) | 6.69 (170) | 6.69 (170) | 0 (0) 0% |
| Circum. inches (mm) | 76.54 (1944.02) | 66.02 (1676.98) | -10.51 (-267.04) -13.7% |
| Sidewall Height inches (mm) | 3.68 (93.5) | 2.01 (51) | -1.67 (-42.5) -45.5% |
| Revolutions per mile (km) | 827.84 (514.4) | 959.67 (596.31) | 131.82 (81.91) 15.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.25 mph (27.77 km/h) |
| 25 mph (40.23 km/h) | 21.57 mph (34.71 km/h) |
| 30 mph (48.28 km/h) | 25.88 mph (41.65 km/h) |
| 35 mph (56.33 km/h) | 30.19 mph (48.59 km/h) |
| 40 mph (64.37 km/h) | 34.51 mph (55.53 km/h) |
| 45 mph (72.42 km/h) | 38.82 mph (62.47 km/h) |
| 50 mph (80.47 km/h) | 43.13 mph (69.41 km/h) |
| 55 mph (88.51 km/h) | 47.45 mph (76.36 km/h) |
| 60 mph (96.56 km/h) | 51.76 mph (83.3 km/h) |
| 65 mph (104.61 km/h) | 56.07 mph (90.24 km/h) |
| 70 mph (112.65 km/h) | 60.38 mph (97.18 km/h) |
| 75 mph (120.7 km/h) | 64.7 mph (104.12 km/h) |
| 80 mph (128.75 km/h) | 69.01 mph (111.06 km/h) |
| 85 mph (136.79 km/h) | 73.32 mph (118 km/h) |
| 90 mph (144.84 km/h) | 77.64 mph (124.95 km/h) |
| 95 mph (152.89 km/h) | 81.95 mph (131.89 km/h) |
| 100 mph (160.93 km/h) | 86.26 mph (138.83 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
