Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/55-15 | 185/45-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.01 (584.5) | 21.56 (547.5) | -1.46 (-37) -6.3% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 72.29 (1836.26) | 67.72 (1720.02) | -4.58 (-116.24) -6.3% |
| Sidewall Height inches (mm) | 4.01 (101.75) | 3.28 (83.25) | -0.73 (-18.5) -18.2% |
| Revolutions per mile (km) | 876.42 (544.58) | 935.65 (581.39) | 59.23 (36.8) 6.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.73 mph (30.15 km/h) |
| 25 mph (40.23 km/h) | 23.42 mph (37.69 km/h) |
| 30 mph (48.28 km/h) | 28.1 mph (45.22 km/h) |
| 35 mph (56.33 km/h) | 32.78 mph (52.76 km/h) |
| 40 mph (64.37 km/h) | 37.47 mph (60.3 km/h) |
| 45 mph (72.42 km/h) | 42.15 mph (67.84 km/h) |
| 50 mph (80.47 km/h) | 46.83 mph (75.37 km/h) |
| 55 mph (88.51 km/h) | 51.52 mph (82.91 km/h) |
| 60 mph (96.56 km/h) | 56.2 mph (90.45 km/h) |
| 65 mph (104.61 km/h) | 60.89 mph (97.99 km/h) |
| 70 mph (112.65 km/h) | 65.57 mph (105.52 km/h) |
| 75 mph (120.7 km/h) | 70.25 mph (113.06 km/h) |
| 80 mph (128.75 km/h) | 74.94 mph (120.6 km/h) |
| 85 mph (136.79 km/h) | 79.62 mph (128.14 km/h) |
| 90 mph (144.84 km/h) | 84.3 mph (135.67 km/h) |
| 95 mph (152.89 km/h) | 88.99 mph (143.21 km/h) |
| 100 mph (160.93 km/h) | 93.67 mph (150.75 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
