1. Wheels

　　When selecting materials, consider that they are suitable for different site pavements, such as floor pavements, cement pavements, and asphalt pavements. No matter what kind of road you are sliding on, the wheels must have good elasticity, wear resistance, and moderate hardness, and ensure that the wheels have a sufficient coefficient of friction on the road. (The hardness coefficient of wheels generally has three units, A, B, D. Because some materials and indicators are different, accurate conversion cannot be performed.)

　　2. Cushions and covers

　　Mainly play the role of buffer and shock absorption. One is to play the role of shock absorption when the road surface is uneven; the second is to protect the parts when the amount of exercise is large; the third is to play the role of keeping the body balanced.

　　3. Board surface

　　Generally, it is made of a Canadian maple multi-layer board. The compression process is divided into cold pressing and hot pressing. Cold pressing is to directly compress the wood chips without adding glue, which is more advanced and has better performance. The board surface has high-strength impact toughness and good elasticity. When jumping on the skateboard at a certain height, ensure that the pedal is not damaged.

　　4. Bracket

　　Bracket, we call it "bridge" for short. The bridge is the skateboard accessory that bears the most torsion, squeeze, and friction in the entire skateboard. The bridges are generally cast with alloys, and the craftsmanship and design differ between brands. Bridges are divided into high, medium, and low. At the same time, the length of the central axis of the bridge is also matched with the width of the different boards. There are many other performance indicators of skateboarding, which need to be further understood. Of course, skateboarding still has a lot of knowledge that we need to learn.