Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/55-19 | 285/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.04 (763.1) | 32.59 (827.7) | 2.54 (64.6) 8.5% |
| Width inches (mm) | 10.04 (255) | 11.22 (285) | 1.18 (30) 11.8% |
| Circum. inches (mm) | 94.38 (2397.35) | 102.37 (2600.3) | 7.99 (202.95) 8.5% |
| Sidewall Height inches (mm) | 5.52 (140.25) | 7.29 (185.25) | 1.77 (45) 32.1% |
| Revolutions per mile (km) | 671.3 (417.13) | 618.91 (384.57) | -52.39 (-32.56) -7.8% |
285/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.69 mph (34.91 km/h) |
| 25 mph (40.23 km/h) | 27.12 mph (43.64 km/h) |
| 30 mph (48.28 km/h) | 32.54 mph (52.37 km/h) |
| 35 mph (56.33 km/h) | 37.96 mph (61.1 km/h) |
| 40 mph (64.37 km/h) | 43.39 mph (69.82 km/h) |
| 45 mph (72.42 km/h) | 48.81 mph (78.55 km/h) |
| 50 mph (80.47 km/h) | 54.23 mph (87.28 km/h) |
| 55 mph (88.51 km/h) | 59.66 mph (96.01 km/h) |
| 60 mph (96.56 km/h) | 65.08 mph (104.74 km/h) |
| 65 mph (104.61 km/h) | 70.5 mph (113.46 km/h) |
| 70 mph (112.65 km/h) | 75.93 mph (122.19 km/h) |
| 75 mph (120.7 km/h) | 81.35 mph (130.92 km/h) |
| 80 mph (128.75 km/h) | 86.77 mph (139.65 km/h) |
| 85 mph (136.79 km/h) | 92.2 mph (148.37 km/h) |
| 90 mph (144.84 km/h) | 97.62 mph (157.1 km/h) |
| 95 mph (152.89 km/h) | 103.04 mph (165.83 km/h) |
| 100 mph (160.93 km/h) | 108.47 mph (174.56 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
