Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 170/55-17 | 180/50-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.36 (618.8) | 24.09 (611.8) | -0.28 (-7) -1.1% |
| Width inches (mm) | 6.69 (170) | 7.09 (180) | 0.39 (10) 5.9% |
| Circum. inches (mm) | 76.54 (1944.02) | 75.67 (1922.03) | -0.87 (-21.99) -1.1% |
| Sidewall Height inches (mm) | 3.68 (93.5) | 3.54 (90) | -0.14 (-3.5) -3.7% |
| Revolutions per mile (km) | 827.84 (514.4) | 837.32 (520.28) | 9.47 (5.89) 1.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.77 mph (31.82 km/h) |
| 25 mph (40.23 km/h) | 24.72 mph (39.78 km/h) |
| 30 mph (48.28 km/h) | 29.66 mph (47.73 km/h) |
| 35 mph (56.33 km/h) | 34.6 mph (55.69 km/h) |
| 40 mph (64.37 km/h) | 39.55 mph (63.65 km/h) |
| 45 mph (72.42 km/h) | 44.49 mph (71.6 km/h) |
| 50 mph (80.47 km/h) | 49.43 mph (79.56 km/h) |
| 55 mph (88.51 km/h) | 54.38 mph (87.51 km/h) |
| 60 mph (96.56 km/h) | 59.32 mph (95.47 km/h) |
| 65 mph (104.61 km/h) | 64.26 mph (103.42 km/h) |
| 70 mph (112.65 km/h) | 69.21 mph (111.38 km/h) |
| 75 mph (120.7 km/h) | 74.15 mph (119.34 km/h) |
| 80 mph (128.75 km/h) | 79.1 mph (127.29 km/h) |
| 85 mph (136.79 km/h) | 84.04 mph (135.25 km/h) |
| 90 mph (144.84 km/h) | 88.98 mph (143.2 km/h) |
| 95 mph (152.89 km/h) | 93.93 mph (151.16 km/h) |
| 100 mph (160.93 km/h) | 98.87 mph (159.11 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2131 | 2475 | 2666 | 2784 | 2911 | 3001 | 3101 | 3219 | 3382 | 3545 | 3727 | 3872 | 4135 | 4425 | 4652 | 4797 | 4878 | 5177 | 5595 | 6501 |
Better Fuel Economy Factory Ratios Increased Power
