Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/45-18 | 275/85-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.1 (713.7) | 36.41 (924.7) | 8.31 (211) 29.6% |
| Width inches (mm) | 11.22 (285) | 10.83 (275) | -0.39 (-10) -3.5% |
| Circum. inches (mm) | 88.27 (2242.15) | 114.37 (2905.03) | 26.1 (662.88) 29.6% |
| Sidewall Height inches (mm) | 5.05 (128.25) | 9.2 (233.75) | 4.15 (105.5) 82.3% |
| Revolutions per mile (km) | 717.77 (446) | 553.99 (344.23) | -163.78 (-101.77) -22.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.91 mph (41.7 km/h) |
| 25 mph (40.23 km/h) | 32.39 mph (52.13 km/h) |
| 30 mph (48.28 km/h) | 38.87 mph (62.55 km/h) |
| 35 mph (56.33 km/h) | 45.35 mph (72.98 km/h) |
| 40 mph (64.37 km/h) | 51.83 mph (83.41 km/h) |
| 45 mph (72.42 km/h) | 58.3 mph (93.83 km/h) |
| 50 mph (80.47 km/h) | 64.78 mph (104.26 km/h) |
| 55 mph (88.51 km/h) | 71.26 mph (114.68 km/h) |
| 60 mph (96.56 km/h) | 77.74 mph (125.11 km/h) |
| 65 mph (104.61 km/h) | 84.22 mph (135.53 km/h) |
| 70 mph (112.65 km/h) | 90.69 mph (145.96 km/h) |
| 75 mph (120.7 km/h) | 97.17 mph (156.39 km/h) |
| 80 mph (128.75 km/h) | 103.65 mph (166.81 km/h) |
| 85 mph (136.79 km/h) | 110.13 mph (177.24 km/h) |
| 90 mph (144.84 km/h) | 116.61 mph (187.66 km/h) |
| 95 mph (152.89 km/h) | 123.09 mph (198.09 km/h) |
| 100 mph (160.93 km/h) | 129.56 mph (208.51 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1410 | 1638 | 1764 | 1842 | 1926 | 1986 | 2052 | 2130 | 2238 | 2346 | 2466 | 2562 | 2736 | 2928 | 3078 | 3174 | 3228 | 3425 | 3701 | 4301 |
Better Fuel Economy Factory Ratios Increased Power
