When traveling or traveling on business, a beautiful and easy-to-use travel trolley seems to be essential. A suitable trolley case can greatly reduce our burden when traveling and avoid the embarrassing appearance of a Christmas tree. In order to better protect the items in the luggage, many people choose hard luggage. Of course, in addition to this, the choice of wheels is also very important!   The selection method of luggage wheels: First, from the type selection, there are many types of wheels on the luggage, including one-way wheels, airplane wheels, universal wheels, etc.; second, from the selection of raw materials, the wheels used in the production of wheels. The raw materials are also exquisite, pay attention to the raw materials; third, choose from the bearings, the bearing is the most important part of the wheel, and the quality of the bearing should be observed; fourth, select from the sensitivity, and observe the sensitivity of the wheel. Not that the more responsive the wheel, the better.   How to choose wheels for hard luggage   Choose from Type At present, there are three common types of wheels, namely unidirectional wheels, airplane wheels and universal wheels. The number of one-way wheels used in the luggage is two, which is more demanding. The number of universal wheels used in the luggage is low, and the requirements are low; the wheels of the aircraft are double-row wheels. Among them, the plane wheel and the double-row wheel bear more force, the use effect is better, and it is more convenient and labor-saving.   Choose from raw materials Most of the wheels on the luggage are made of rubber, but some are also made of plastic. Due to the different properties of plastic series and rubber materials, their functions and performance are also different after use in luggage. Among them, the rubber wheels have higher elasticity and higher strength, and even in the face of harsh road surfaces, the impact is minimal. Therefore, when choosing, also choose the raw material of the wheel, and try to give priority to rubber-based accessories.   Choose from bearings However, in the overall structure of the wheel, the bearing, as the most important part, presents two materials, one is plastic material and the other is steel material. There is no doubt that steel bearings are harder and more durable. However, the shaft center in the middle of the bearing is also stressed. If steel is also used, it not only has better bearing capacity and impact resistance, but also has a higher wear coefficient. However, if plastic materials are used, the damage rate will be extremely high under long-term bearing wear, so the selection of bearing materials and shafts is also very important.   Choose from sensitivity In addition, it is the sensitivity of observing the wheel. Wheels can be tested before purchasing. If the steering sensitivity of the current wheel is too high, the probability of wheel damage is higher. If the wheel rolls normally and the wheel sensitivity is moderate, it means the state is stable and the usage time is relatively long.   What should I consider when buying luggage?   Material The material problem mainly includes three parts, namely the box material of the luggage, the wheel material and the tie rod material. The wheel is recommended to be made of rubber, the position of the tie rod is recommended to be made of metal, and the box can be made of various materials.   Style In addition, there are many styles of luggage, and different people like different styles. Some boxes have special shapes, while others have larger capacities to meet different needs.   Safety In the case of long-term business trips or business trips, more attention should be paid to the safety of the luggage. However, many high-quality luggage and luggage these days have a strong focus on safety. If there is a need, you can choose from this aspect.