Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/40-15 | 275/45-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.98 (609) | 24.74 (628.5) | 0.77 (19.5) 3.2% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 75.32 (1913.23) | 77.74 (1974.49) | 2.41 (61.26) 3.2% |
| Sidewall Height inches (mm) | 4.49 (114) | 4.87 (123.75) | 0.38 (9.75) 8.6% |
| Revolutions per mile (km) | 841.17 (522.68) | 815.07 (506.46) | -26.1 (-16.22) -3.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.64 mph (33.22 km/h) |
| 25 mph (40.23 km/h) | 25.8 mph (41.52 km/h) |
| 30 mph (48.28 km/h) | 30.96 mph (49.83 km/h) |
| 35 mph (56.33 km/h) | 36.12 mph (58.13 km/h) |
| 40 mph (64.37 km/h) | 41.28 mph (66.44 km/h) |
| 45 mph (72.42 km/h) | 46.44 mph (74.74 km/h) |
| 50 mph (80.47 km/h) | 51.6 mph (83.04 km/h) |
| 55 mph (88.51 km/h) | 56.76 mph (91.35 km/h) |
| 60 mph (96.56 km/h) | 61.92 mph (99.65 km/h) |
| 65 mph (104.61 km/h) | 67.08 mph (107.96 km/h) |
| 70 mph (112.65 km/h) | 72.24 mph (116.26 km/h) |
| 75 mph (120.7 km/h) | 77.4 mph (124.57 km/h) |
| 80 mph (128.75 km/h) | 82.56 mph (132.87 km/h) |
| 85 mph (136.79 km/h) | 87.72 mph (141.17 km/h) |
| 90 mph (144.84 km/h) | 92.88 mph (149.48 km/h) |
| 95 mph (152.89 km/h) | 98.04 mph (157.78 km/h) |
| 100 mph (160.93 km/h) | 103.2 mph (166.09 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2074 | 2410 | 2595 | 2710 | 2833 | 2922 | 3019 | 3133 | 3292 | 3451 | 3628 | 3769 | 4025 | 4307 | 4528 | 4669 | 4749 | 5040 | 5446 | 6328 |
Better Fuel Economy Factory Ratios Increased Power
