Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/55-18 | 280/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.34 (770.7) | 27.92 (709.2) | -2.42 (-61.5) -8% |
| Width inches (mm) | 11.22 (285) | 11.02 (280) | -0.2 (-5) -1.8% |
| Circum. inches (mm) | 95.32 (2421.23) | 87.72 (2228.02) | -7.61 (-193.21) -8% |
| Sidewall Height inches (mm) | 6.17 (156.75) | 4.96 (126) | -1.21 (-30.75) -19.6% |
| Revolutions per mile (km) | 664.68 (413.01) | 722.32 (448.83) | 57.64 (35.82) 8.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.4 mph (29.62 km/h) |
| 25 mph (40.23 km/h) | 23.01 mph (37.02 km/h) |
| 30 mph (48.28 km/h) | 27.61 mph (44.43 km/h) |
| 35 mph (56.33 km/h) | 32.21 mph (51.83 km/h) |
| 40 mph (64.37 km/h) | 36.81 mph (59.24 km/h) |
| 45 mph (72.42 km/h) | 41.41 mph (66.64 km/h) |
| 50 mph (80.47 km/h) | 46.01 mph (74.05 km/h) |
| 55 mph (88.51 km/h) | 50.61 mph (81.45 km/h) |
| 60 mph (96.56 km/h) | 55.21 mph (88.86 km/h) |
| 65 mph (104.61 km/h) | 59.81 mph (96.26 km/h) |
| 70 mph (112.65 km/h) | 64.41 mph (103.66 km/h) |
| 75 mph (120.7 km/h) | 69.02 mph (111.07 km/h) |
| 80 mph (128.75 km/h) | 73.62 mph (118.47 km/h) |
| 85 mph (136.79 km/h) | 78.22 mph (125.88 km/h) |
| 90 mph (144.84 km/h) | 82.82 mph (133.28 km/h) |
| 95 mph (152.89 km/h) | 87.42 mph (140.69 km/h) |
| 100 mph (160.93 km/h) | 92.02 mph (148.09 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1838 | 2135 | 2300 | 2401 | 2511 | 2589 | 2675 | 2777 | 2918 | 3058 | 3215 | 3340 | 3567 | 3817 | 4013 | 4138 | 4208 | 4466 | 4826 | 5608 |
Better Fuel Economy Factory Ratios Increased Power
