Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/60-18 | 285/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.32 (643.2) | 32.59 (827.7) | 7.26 (184.5) 28.7% |
| Width inches (mm) | 6.1 (155) | 11.22 (285) | 5.12 (130) 83.9% |
| Circum. inches (mm) | 79.55 (2020.67) | 102.37 (2600.3) | 22.82 (579.62) 28.7% |
| Sidewall Height inches (mm) | 3.66 (93) | 7.29 (185.25) | 3.63 (92.25) 99.2% |
| Revolutions per mile (km) | 796.44 (494.88) | 618.91 (384.57) | -177.53 (-110.31) -22.3% |
285/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.74 mph (41.42 km/h) |
| 25 mph (40.23 km/h) | 32.17 mph (51.77 km/h) |
| 30 mph (48.28 km/h) | 38.61 mph (62.13 km/h) |
| 35 mph (56.33 km/h) | 45.04 mph (72.48 km/h) |
| 40 mph (64.37 km/h) | 51.47 mph (82.84 km/h) |
| 45 mph (72.42 km/h) | 57.91 mph (93.19 km/h) |
| 50 mph (80.47 km/h) | 64.34 mph (103.55 km/h) |
| 55 mph (88.51 km/h) | 70.78 mph (113.9 km/h) |
| 60 mph (96.56 km/h) | 77.21 mph (124.26 km/h) |
| 65 mph (104.61 km/h) | 83.65 mph (134.61 km/h) |
| 70 mph (112.65 km/h) | 90.08 mph (144.97 km/h) |
| 75 mph (120.7 km/h) | 96.51 mph (155.32 km/h) |
| 80 mph (128.75 km/h) | 102.95 mph (165.68 km/h) |
| 85 mph (136.79 km/h) | 109.38 mph (176.03 km/h) |
| 90 mph (144.84 km/h) | 115.82 mph (186.39 km/h) |
| 95 mph (152.89 km/h) | 122.25 mph (196.74 km/h) |
| 100 mph (160.93 km/h) | 128.68 mph (207.1 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
