There are three kinds of wheels for Trolley bags, the first is one-way wheel, the second is universal wheel, and the other is double-row universal wheel, among which double-row universal wheel is more durable, and its load-bearing capacity is higher than other wheels. Strong, wear-resistant and durable, the service life is longer, and the 360-degree rotating design allows you to walk more freely, no matter which direction you go, it will not be stuck. The bearing of the wheel should be made of steel as much as possible, which is not easy to break and is more durable. The trolleys of the trolley case are generally made of aluminum alloys. In general, aluminum alloys should be basically enough, so when we look at the trolleys, we need to see how many gears and how many centimeters the swing range is within. . If you buy a hard trolley case, check whether the quality can bear the weight and withstand the impact.

How to maintain the trolley case Many friends' trolley case has many problems after using it for a long time, and they will complain that the quality of the trolley case is too poor. In fact, it is not the damage caused by the poor quality of the trolley case. If you do not know how to maintain the trolley case, it is also a major cause of damage.

1. When using the trolley case, pay attention to prevent the environment of high temperature and strong acid and alkali, and the high pressure environment will also deform your trolley case.

2. Avoid sharp objects such as knives from being scratched. No matter how hard the trolley case is, it cannot compete with knives.

3. You can use cold water when cleaning, but please do not iron, it will burn the epidermis.

4. The use of the trolley case should avoid being in a humid environment for a long time, which will make the trolley case lose its original toughness. The PC trolley case is chemically resistant.