Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/75-18 | 285/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.83 (884.7) | 35.95 (913.2) | 1.12 (28.5) 3.2% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 109.42 (2779.37) | 112.95 (2868.9) | 3.53 (89.54) 3.2% |
| Sidewall Height inches (mm) | 8.42 (213.75) | 8.98 (228) | 0.56 (14.25) 6.7% |
| Revolutions per mile (km) | 579.03 (359.79) | 560.96 (348.56) | -18.07 (-11.23) -3.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.64 mph (33.22 km/h) |
| 25 mph (40.23 km/h) | 25.81 mph (41.53 km/h) |
| 30 mph (48.28 km/h) | 30.97 mph (49.84 km/h) |
| 35 mph (56.33 km/h) | 36.13 mph (58.14 km/h) |
| 40 mph (64.37 km/h) | 41.29 mph (66.45 km/h) |
| 45 mph (72.42 km/h) | 46.45 mph (74.75 km/h) |
| 50 mph (80.47 km/h) | 51.61 mph (83.06 km/h) |
| 55 mph (88.51 km/h) | 56.77 mph (91.37 km/h) |
| 60 mph (96.56 km/h) | 61.93 mph (99.67 km/h) |
| 65 mph (104.61 km/h) | 67.09 mph (107.98 km/h) |
| 70 mph (112.65 km/h) | 72.26 mph (116.28 km/h) |
| 75 mph (120.7 km/h) | 77.42 mph (124.59 km/h) |
| 80 mph (128.75 km/h) | 82.58 mph (132.9 km/h) |
| 85 mph (136.79 km/h) | 87.74 mph (141.2 km/h) |
| 90 mph (144.84 km/h) | 92.9 mph (149.51 km/h) |
| 95 mph (152.89 km/h) | 98.06 mph (157.81 km/h) |
| 100 mph (160.93 km/h) | 103.22 mph (166.12 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1428 | 1658 | 1786 | 1865 | 1950 | 2011 | 2078 | 2156 | 2266 | 2375 | 2497 | 2594 | 2770 | 2964 | 3116 | 3213 | 3268 | 3469 | 3748 | 4356 |
Better Fuel Economy Factory Ratios Increased Power
