Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 170/60-17 | 170/85-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.03 (635.8) | 28.38 (720.8) | 3.35 (85) 13.4% |
| Width inches (mm) | 6.69 (170) | 6.69 (170) | 0 (0) 0% |
| Circum. inches (mm) | 78.64 (1997.42) | 89.15 (2264.46) | 10.51 (267.04) 13.4% |
| Sidewall Height inches (mm) | 4.02 (102) | 5.69 (144.5) | 1.67 (42.5) 41.7% |
| Revolutions per mile (km) | 805.71 (500.64) | 710.7 (441.61) | -95.01 (-59.04) -11.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.67 mph (36.49 km/h) |
| 25 mph (40.23 km/h) | 28.34 mph (45.61 km/h) |
| 30 mph (48.28 km/h) | 34.01 mph (54.74 km/h) |
| 35 mph (56.33 km/h) | 39.68 mph (63.86 km/h) |
| 40 mph (64.37 km/h) | 45.35 mph (72.98 km/h) |
| 45 mph (72.42 km/h) | 51.02 mph (82.1 km/h) |
| 50 mph (80.47 km/h) | 56.68 mph (91.23 km/h) |
| 55 mph (88.51 km/h) | 62.35 mph (100.35 km/h) |
| 60 mph (96.56 km/h) | 68.02 mph (109.47 km/h) |
| 65 mph (104.61 km/h) | 73.69 mph (118.59 km/h) |
| 70 mph (112.65 km/h) | 79.36 mph (127.72 km/h) |
| 75 mph (120.7 km/h) | 85.03 mph (136.84 km/h) |
| 80 mph (128.75 km/h) | 90.7 mph (145.96 km/h) |
| 85 mph (136.79 km/h) | 96.36 mph (155.08 km/h) |
| 90 mph (144.84 km/h) | 102.03 mph (164.21 km/h) |
| 95 mph (152.89 km/h) | 107.7 mph (173.33 km/h) |
| 100 mph (160.93 km/h) | 113.37 mph (182.45 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1809 | 2101 | 2263 | 2363 | 2470 | 2547 | 2632 | 2732 | 2871 | 3009 | 3163 | 3286 | 3509 | 3756 | 3948 | 4071 | 4141 | 4394 | 4749 | 5518 |
Better Fuel Economy Factory Ratios Increased Power
