Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/70-18 | 285/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.71 (856.2) | 32.59 (827.7) | -1.12 (-28.5) -3.3% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 105.9 (2689.83) | 102.37 (2600.3) | -3.53 (-89.54) -3.3% |
| Sidewall Height inches (mm) | 7.85 (199.5) | 7.29 (185.25) | -0.56 (-14.25) -7.1% |
| Revolutions per mile (km) | 598.31 (371.77) | 618.91 (384.57) | 20.6 (12.8) 3.4% |
285/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.33 mph (31.12 km/h) |
| 25 mph (40.23 km/h) | 24.17 mph (38.89 km/h) |
| 30 mph (48.28 km/h) | 29 mph (46.67 km/h) |
| 35 mph (56.33 km/h) | 33.83 mph (54.45 km/h) |
| 40 mph (64.37 km/h) | 38.67 mph (62.23 km/h) |
| 45 mph (72.42 km/h) | 43.5 mph (70.01 km/h) |
| 50 mph (80.47 km/h) | 48.34 mph (77.79 km/h) |
| 55 mph (88.51 km/h) | 53.17 mph (85.57 km/h) |
| 60 mph (96.56 km/h) | 58 mph (93.35 km/h) |
| 65 mph (104.61 km/h) | 62.84 mph (101.13 km/h) |
| 70 mph (112.65 km/h) | 67.67 mph (108.9 km/h) |
| 75 mph (120.7 km/h) | 72.5 mph (116.68 km/h) |
| 80 mph (128.75 km/h) | 77.34 mph (124.46 km/h) |
| 85 mph (136.79 km/h) | 82.17 mph (132.24 km/h) |
| 90 mph (144.84 km/h) | 87 mph (140.02 km/h) |
| 95 mph (152.89 km/h) | 91.84 mph (147.8 km/h) |
| 100 mph (160.93 km/h) | 96.67 mph (155.58 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1575 | 1830 | 1970 | 2058 | 2151 | 2218 | 2292 | 2379 | 2500 | 2621 | 2755 | 2862 | 3056 | 3271 | 3438 | 3545 | 3606 | 3827 | 4135 | 4805 |
Better Fuel Economy Factory Ratios Increased Power
