As follows:

1. Use the arc command to draw the outline according to the outer diameter, cross-section width and rim diameter of the tire specification for size envelope analysis.

2. The tire parameters are 85% of the section width, the shoulder arc radius is 25mm, the horizontal axis is about 50% of the section height, and the rim line height is about 23mm.

3. Merge into a closed circle of curves, then find the center of the tire, draw a straight line as the axis of rotation, and complete it through three-dimensional rotation.