Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/50-15 | 185/45-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.28 (566) | 21.56 (547.5) | -0.73 (-18.5) -3.3% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 70.01 (1778.14) | 67.72 (1720.02) | -2.29 (-58.12) -3.3% |
| Sidewall Height inches (mm) | 3.64 (92.5) | 3.28 (83.25) | -0.36 (-9.25) -10% |
| Revolutions per mile (km) | 905.07 (562.38) | 935.65 (581.39) | 30.58 (19) 3.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.35 mph (31.13 km/h) |
| 25 mph (40.23 km/h) | 24.18 mph (38.92 km/h) |
| 30 mph (48.28 km/h) | 29.02 mph (46.7 km/h) |
| 35 mph (56.33 km/h) | 33.86 mph (54.49 km/h) |
| 40 mph (64.37 km/h) | 38.69 mph (62.27 km/h) |
| 45 mph (72.42 km/h) | 43.53 mph (70.05 km/h) |
| 50 mph (80.47 km/h) | 48.37 mph (77.84 km/h) |
| 55 mph (88.51 km/h) | 53.2 mph (85.62 km/h) |
| 60 mph (96.56 km/h) | 58.04 mph (93.4 km/h) |
| 65 mph (104.61 km/h) | 62.88 mph (101.19 km/h) |
| 70 mph (112.65 km/h) | 67.71 mph (108.97 km/h) |
| 75 mph (120.7 km/h) | 72.55 mph (116.76 km/h) |
| 80 mph (128.75 km/h) | 77.39 mph (124.54 km/h) |
| 85 mph (136.79 km/h) | 82.22 mph (132.32 km/h) |
| 90 mph (144.84 km/h) | 87.06 mph (140.11 km/h) |
| 95 mph (152.89 km/h) | 91.89 mph (147.89 km/h) |
| 100 mph (160.93 km/h) | 96.73 mph (155.67 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
