Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/45-18 | 285/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.1 (713.7) | 30.34 (770.7) | 2.24 (57) 8% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 88.27 (2242.15) | 95.32 (2421.23) | 7.05 (179.07) 8% |
| Sidewall Height inches (mm) | 5.05 (128.25) | 6.17 (156.75) | 1.12 (28.5) 22.2% |
| Revolutions per mile (km) | 717.77 (446) | 664.68 (413.01) | -53.09 (-32.99) -7.4% |
285/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.6 mph (34.76 km/h) |
| 25 mph (40.23 km/h) | 27 mph (43.45 km/h) |
| 30 mph (48.28 km/h) | 32.4 mph (52.14 km/h) |
| 35 mph (56.33 km/h) | 37.8 mph (60.83 km/h) |
| 40 mph (64.37 km/h) | 43.19 mph (69.52 km/h) |
| 45 mph (72.42 km/h) | 48.59 mph (78.2 km/h) |
| 50 mph (80.47 km/h) | 53.99 mph (86.89 km/h) |
| 55 mph (88.51 km/h) | 59.39 mph (95.58 km/h) |
| 60 mph (96.56 km/h) | 64.79 mph (104.27 km/h) |
| 65 mph (104.61 km/h) | 70.19 mph (112.96 km/h) |
| 70 mph (112.65 km/h) | 75.59 mph (121.65 km/h) |
| 75 mph (120.7 km/h) | 80.99 mph (130.34 km/h) |
| 80 mph (128.75 km/h) | 86.39 mph (139.03 km/h) |
| 85 mph (136.79 km/h) | 91.79 mph (147.72 km/h) |
| 90 mph (144.84 km/h) | 97.19 mph (156.41 km/h) |
| 95 mph (152.89 km/h) | 102.59 mph (165.1 km/h) |
| 100 mph (160.93 km/h) | 107.99 mph (173.79 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1691 | 1965 | 2116 | 2210 | 2311 | 2382 | 2462 | 2555 | 2685 | 2814 | 2958 | 3073 | 3282 | 3513 | 3692 | 3808 | 3872 | 4110 | 4441 | 5161 |
Better Fuel Economy Factory Ratios Increased Power
