Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/40-15 | 255/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.98 (609) | 26.04 (661.5) | 2.07 (52.5) 8.6% |
| Width inches (mm) | 11.22 (285) | 10.04 (255) | -1.18 (-30) -10.5% |
| Circum. inches (mm) | 75.32 (1913.23) | 81.82 (2078.16) | 6.49 (164.93) 8.6% |
| Sidewall Height inches (mm) | 4.49 (114) | 5.52 (140.25) | 1.03 (26.25) 23% |
| Revolutions per mile (km) | 841.17 (522.68) | 774.41 (481.19) | -66.76 (-41.48) -7.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.72 mph (34.96 km/h) |
| 25 mph (40.23 km/h) | 27.16 mph (43.7 km/h) |
| 30 mph (48.28 km/h) | 32.59 mph (52.44 km/h) |
| 35 mph (56.33 km/h) | 38.02 mph (61.18 km/h) |
| 40 mph (64.37 km/h) | 43.45 mph (69.92 km/h) |
| 45 mph (72.42 km/h) | 48.88 mph (78.66 km/h) |
| 50 mph (80.47 km/h) | 54.31 mph (87.4 km/h) |
| 55 mph (88.51 km/h) | 59.74 mph (96.14 km/h) |
| 60 mph (96.56 km/h) | 65.17 mph (104.89 km/h) |
| 65 mph (104.61 km/h) | 70.6 mph (113.63 km/h) |
| 70 mph (112.65 km/h) | 76.03 mph (122.37 km/h) |
| 75 mph (120.7 km/h) | 81.47 mph (131.11 km/h) |
| 80 mph (128.75 km/h) | 86.9 mph (139.85 km/h) |
| 85 mph (136.79 km/h) | 92.33 mph (148.59 km/h) |
| 90 mph (144.84 km/h) | 97.76 mph (157.33 km/h) |
| 95 mph (152.89 km/h) | 103.19 mph (166.07 km/h) |
| 100 mph (160.93 km/h) | 108.62 mph (174.81 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1971 | 2289 | 2465 | 2575 | 2692 | 2776 | 2868 | 2977 | 3128 | 3279 | 3447 | 3581 | 3824 | 4092 | 4302 | 4436 | 4512 | 4788 | 5174 | 6013 |
Better Fuel Economy Factory Ratios Increased Power
