Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/45-15 | 175/50-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.56 (547.5) | 21.89 (556) | 0.33 (8.5) 1.6% |
| Width inches (mm) | 7.28 (185) | 6.89 (175) | -0.39 (-10) -5.4% |
| Circum. inches (mm) | 67.72 (1720.02) | 68.77 (1746.73) | 1.05 (26.7) 1.6% |
| Sidewall Height inches (mm) | 3.28 (83.25) | 3.44 (87.5) | 0.17 (4.25) 5.1% |
| Revolutions per mile (km) | 935.65 (581.39) | 921.35 (572.5) | -14.3 (-8.89) -1.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.31 mph (32.69 km/h) |
| 25 mph (40.23 km/h) | 25.39 mph (40.86 km/h) |
| 30 mph (48.28 km/h) | 30.47 mph (49.03 km/h) |
| 35 mph (56.33 km/h) | 35.54 mph (57.2 km/h) |
| 40 mph (64.37 km/h) | 40.62 mph (65.37 km/h) |
| 45 mph (72.42 km/h) | 45.7 mph (73.54 km/h) |
| 50 mph (80.47 km/h) | 50.78 mph (81.72 km/h) |
| 55 mph (88.51 km/h) | 55.85 mph (89.89 km/h) |
| 60 mph (96.56 km/h) | 60.93 mph (98.06 km/h) |
| 65 mph (104.61 km/h) | 66.01 mph (106.23 km/h) |
| 70 mph (112.65 km/h) | 71.09 mph (114.4 km/h) |
| 75 mph (120.7 km/h) | 76.16 mph (122.57 km/h) |
| 80 mph (128.75 km/h) | 81.24 mph (130.75 km/h) |
| 85 mph (136.79 km/h) | 86.32 mph (138.92 km/h) |
| 90 mph (144.84 km/h) | 91.4 mph (147.09 km/h) |
| 95 mph (152.89 km/h) | 96.47 mph (155.26 km/h) |
| 100 mph (160.93 km/h) | 101.55 mph (163.43 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
