Hub structure
1, rims: with the tire assembly, support the tire part of the wheel.
2. Spoke: It is installed and connected with the axle hub to support the wheel part of the rim.
3. Offset: The distance between the center of the rim and the mounting surface of the spokes. There are positive offset, zero offset, and negative offset.
4. Rim: Hold and support the rim portion of the tire.
5, bead seat: also known as the mounting surface, contact with the tire ring, supporting the rim of the tire to maintain the radial direction.
6, the bottom of the groove: To facilitate the assembly and disassembly of the tire, a certain depth and width of the pit on the rim.
7, valve hole: Install the tire valve hole.