Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/80-15 | 175/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.39 (645) | 22.58 (573.5) | -2.81 (-71.5) -11.1% |
| Width inches (mm) | 6.5 (165) | 6.89 (175) | 0.39 (10) 6.1% |
| Circum. inches (mm) | 79.78 (2026.33) | 70.93 (1801.7) | -8.84 (-224.62) -11.1% |
| Sidewall Height inches (mm) | 5.2 (132) | 3.79 (96.25) | -1.41 (-35.75) -27.1% |
| Revolutions per mile (km) | 794.22 (493.5) | 893.23 (555.03) | 99.02 (61.53) 12.5% |
175/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.78 mph (28.62 km/h) |
| 25 mph (40.23 km/h) | 22.23 mph (35.77 km/h) |
| 30 mph (48.28 km/h) | 26.67 mph (42.93 km/h) |
| 35 mph (56.33 km/h) | 31.12 mph (50.08 km/h) |
| 40 mph (64.37 km/h) | 35.57 mph (57.24 km/h) |
| 45 mph (72.42 km/h) | 40.01 mph (64.39 km/h) |
| 50 mph (80.47 km/h) | 44.46 mph (71.55 km/h) |
| 55 mph (88.51 km/h) | 48.9 mph (78.7 km/h) |
| 60 mph (96.56 km/h) | 53.35 mph (85.86 km/h) |
| 65 mph (104.61 km/h) | 57.79 mph (93.01 km/h) |
| 70 mph (112.65 km/h) | 62.24 mph (100.17 km/h) |
| 75 mph (120.7 km/h) | 66.69 mph (107.32 km/h) |
| 80 mph (128.75 km/h) | 71.13 mph (114.48 km/h) |
| 85 mph (136.79 km/h) | 75.58 mph (121.63 km/h) |
| 90 mph (144.84 km/h) | 80.02 mph (128.79 km/h) |
| 95 mph (152.89 km/h) | 84.47 mph (135.94 km/h) |
| 100 mph (160.93 km/h) | 88.91 mph (143.09 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2273 | 2641 | 2844 | 2970 | 3105 | 3202 | 3308 | 3434 | 3608 | 3782 | 3976 | 4130 | 4411 | 4720 | 4962 | 5117 | 5204 | 5523 | 5968 | 6935 |
Better Fuel Economy Factory Ratios Increased Power
