Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/45-15 | 165/50-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.56 (547.5) | 21.5 (546) | -0.06 (-1.5) -0.3% |
| Width inches (mm) | 7.28 (185) | 6.5 (165) | -0.79 (-20) -10.8% |
| Circum. inches (mm) | 67.72 (1720.02) | 67.53 (1715.31) | -0.19 (-4.71) -0.3% |
| Sidewall Height inches (mm) | 3.28 (83.25) | 3.25 (82.5) | -0.03 (-0.75) -0.9% |
| Revolutions per mile (km) | 935.65 (581.39) | 938.22 (582.98) | 2.57 (1.6) 0.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.95 mph (32.1 km/h) |
| 25 mph (40.23 km/h) | 24.93 mph (40.12 km/h) |
| 30 mph (48.28 km/h) | 29.92 mph (48.15 km/h) |
| 35 mph (56.33 km/h) | 34.9 mph (56.17 km/h) |
| 40 mph (64.37 km/h) | 39.89 mph (64.2 km/h) |
| 45 mph (72.42 km/h) | 44.88 mph (72.22 km/h) |
| 50 mph (80.47 km/h) | 49.86 mph (80.25 km/h) |
| 55 mph (88.51 km/h) | 54.85 mph (88.27 km/h) |
| 60 mph (96.56 km/h) | 59.84 mph (96.3 km/h) |
| 65 mph (104.61 km/h) | 64.82 mph (104.32 km/h) |
| 70 mph (112.65 km/h) | 69.81 mph (112.35 km/h) |
| 75 mph (120.7 km/h) | 74.79 mph (120.37 km/h) |
| 80 mph (128.75 km/h) | 79.78 mph (128.4 km/h) |
| 85 mph (136.79 km/h) | 84.77 mph (136.42 km/h) |
| 90 mph (144.84 km/h) | 89.75 mph (144.44 km/h) |
| 95 mph (152.89 km/h) | 94.74 mph (152.47 km/h) |
| 100 mph (160.93 km/h) | 99.73 mph (160.49 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
