Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/45-15 | 175/40-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.2 (538.5) | 20.51 (521) | -0.69 (-17.5) -3.2% |
| Width inches (mm) | 6.89 (175) | 6.89 (175) | 0 (0) 0% |
| Circum. inches (mm) | 66.6 (1691.75) | 64.44 (1636.77) | -2.16 (-54.98) -3.2% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 2.76 (70) | -0.34 (-8.75) -11.1% |
| Revolutions per mile (km) | 951.29 (591.1) | 983.24 (610.96) | 31.95 (19.85) 3.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.35 mph (31.14 km/h) |
| 25 mph (40.23 km/h) | 24.19 mph (38.93 km/h) |
| 30 mph (48.28 km/h) | 29.03 mph (46.71 km/h) |
| 35 mph (56.33 km/h) | 33.86 mph (54.5 km/h) |
| 40 mph (64.37 km/h) | 38.7 mph (62.28 km/h) |
| 45 mph (72.42 km/h) | 43.54 mph (70.07 km/h) |
| 50 mph (80.47 km/h) | 48.38 mph (77.85 km/h) |
| 55 mph (88.51 km/h) | 53.21 mph (85.64 km/h) |
| 60 mph (96.56 km/h) | 58.05 mph (93.42 km/h) |
| 65 mph (104.61 km/h) | 62.89 mph (101.21 km/h) |
| 70 mph (112.65 km/h) | 67.73 mph (108.99 km/h) |
| 75 mph (120.7 km/h) | 72.56 mph (116.78 km/h) |
| 80 mph (128.75 km/h) | 77.4 mph (124.56 km/h) |
| 85 mph (136.79 km/h) | 82.24 mph (132.35 km/h) |
| 90 mph (144.84 km/h) | 87.08 mph (140.13 km/h) |
| 95 mph (152.89 km/h) | 91.91 mph (147.92 km/h) |
| 100 mph (160.93 km/h) | 96.75 mph (155.7 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
