Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/45-15 | 175/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.56 (547.5) | 22.58 (573.5) | 1.02 (26) 4.7% |
| Width inches (mm) | 7.28 (185) | 6.89 (175) | -0.39 (-10) -5.4% |
| Circum. inches (mm) | 67.72 (1720.02) | 70.93 (1801.7) | 3.22 (81.68) 4.7% |
| Sidewall Height inches (mm) | 3.28 (83.25) | 3.79 (96.25) | 0.51 (13) 15.6% |
| Revolutions per mile (km) | 935.65 (581.39) | 893.23 (555.03) | -42.42 (-26.36) -4.5% |
175/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.95 mph (33.72 km/h) |
| 25 mph (40.23 km/h) | 26.19 mph (42.14 km/h) |
| 30 mph (48.28 km/h) | 31.42 mph (50.57 km/h) |
| 35 mph (56.33 km/h) | 36.66 mph (59 km/h) |
| 40 mph (64.37 km/h) | 41.9 mph (67.43 km/h) |
| 45 mph (72.42 km/h) | 47.14 mph (75.86 km/h) |
| 50 mph (80.47 km/h) | 52.37 mph (84.29 km/h) |
| 55 mph (88.51 km/h) | 57.61 mph (92.72 km/h) |
| 60 mph (96.56 km/h) | 62.85 mph (101.15 km/h) |
| 65 mph (104.61 km/h) | 68.09 mph (109.58 km/h) |
| 70 mph (112.65 km/h) | 73.32 mph (118 km/h) |
| 75 mph (120.7 km/h) | 78.56 mph (126.43 km/h) |
| 80 mph (128.75 km/h) | 83.8 mph (134.86 km/h) |
| 85 mph (136.79 km/h) | 89.04 mph (143.29 km/h) |
| 90 mph (144.84 km/h) | 94.27 mph (151.72 km/h) |
| 95 mph (152.89 km/h) | 99.51 mph (160.15 km/h) |
| 100 mph (160.93 km/h) | 104.75 mph (168.58 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
