Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/70-18 | 285/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.99 (660.2) | 33.71 (856.2) | 7.72 (196) 29.7% |
| Width inches (mm) | 5.71 (145) | 11.22 (285) | 5.51 (140) 96.6% |
| Circum. inches (mm) | 81.66 (2074.08) | 105.9 (2689.83) | 24.24 (615.75) 29.7% |
| Sidewall Height inches (mm) | 4 (101.5) | 7.85 (199.5) | 3.86 (98) 96.6% |
| Revolutions per mile (km) | 775.93 (482.14) | 598.31 (371.77) | -177.63 (-110.37) -22.9% |
285/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.94 mph (41.74 km/h) |
| 25 mph (40.23 km/h) | 32.42 mph (52.18 km/h) |
| 30 mph (48.28 km/h) | 38.91 mph (62.61 km/h) |
| 35 mph (56.33 km/h) | 45.39 mph (73.05 km/h) |
| 40 mph (64.37 km/h) | 51.88 mph (83.49 km/h) |
| 45 mph (72.42 km/h) | 58.36 mph (93.92 km/h) |
| 50 mph (80.47 km/h) | 64.84 mph (104.36 km/h) |
| 55 mph (88.51 km/h) | 71.33 mph (114.79 km/h) |
| 60 mph (96.56 km/h) | 77.81 mph (125.23 km/h) |
| 65 mph (104.61 km/h) | 84.3 mph (135.66 km/h) |
| 70 mph (112.65 km/h) | 90.78 mph (146.1 km/h) |
| 75 mph (120.7 km/h) | 97.27 mph (156.53 km/h) |
| 80 mph (128.75 km/h) | 103.75 mph (166.97 km/h) |
| 85 mph (136.79 km/h) | 110.23 mph (177.41 km/h) |
| 90 mph (144.84 km/h) | 116.72 mph (187.84 km/h) |
| 95 mph (152.89 km/h) | 123.2 mph (198.28 km/h) |
| 100 mph (160.93 km/h) | 129.69 mph (208.71 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1523 | 1769 | 1905 | 1989 | 2080 | 2145 | 2216 | 2300 | 2417 | 2533 | 2663 | 2767 | 2954 | 3162 | 3324 | 3427 | 3486 | 3700 | 3998 | 4645 |
Better Fuel Economy Factory Ratios Increased Power
