Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/45-15 | 180/45-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.2 (538.5) | 21.38 (543) | 0.18 (4.5) 0.8% |
| Width inches (mm) | 6.89 (175) | 7.09 (180) | 0.2 (5) 2.9% |
| Circum. inches (mm) | 66.6 (1691.75) | 67.16 (1705.88) | 0.56 (14.14) 0.8% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 3.19 (81) | 0.09 (2.25) 2.9% |
| Revolutions per mile (km) | 951.29 (591.1) | 943.41 (586.2) | -7.88 (-4.9) -0.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.17 mph (32.46 km/h) |
| 25 mph (40.23 km/h) | 25.21 mph (40.57 km/h) |
| 30 mph (48.28 km/h) | 30.25 mph (48.68 km/h) |
| 35 mph (56.33 km/h) | 35.29 mph (56.8 km/h) |
| 40 mph (64.37 km/h) | 40.33 mph (64.91 km/h) |
| 45 mph (72.42 km/h) | 45.38 mph (73.03 km/h) |
| 50 mph (80.47 km/h) | 50.42 mph (81.14 km/h) |
| 55 mph (88.51 km/h) | 55.46 mph (89.25 km/h) |
| 60 mph (96.56 km/h) | 60.5 mph (97.37 km/h) |
| 65 mph (104.61 km/h) | 65.54 mph (105.48 km/h) |
| 70 mph (112.65 km/h) | 70.58 mph (113.6 km/h) |
| 75 mph (120.7 km/h) | 75.63 mph (121.71 km/h) |
| 80 mph (128.75 km/h) | 80.67 mph (129.82 km/h) |
| 85 mph (136.79 km/h) | 85.71 mph (137.94 km/h) |
| 90 mph (144.84 km/h) | 90.75 mph (146.05 km/h) |
| 95 mph (152.89 km/h) | 95.79 mph (154.17 km/h) |
| 100 mph (160.93 km/h) | 100.84 mph (162.28 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
