What is the frame of the bicycle accessories?

Frame components constitute the basic structure of the bike, but also the skeleton of the bicycle and the main components are also directly or indirectly installed on the frame.
There are many structural forms of the frame components, but the overall can be divided into two categories: the men's frame and women's frame.
The frame is generally made of ordinary carbon brass after welding, combination. In order to reduce the tube weight, improve strength, more high-end bicycles using low-alloy steel pipe manufacturing. In order to reduce the resistance of fast driving, and some bicycles also use streamlined steel pipe.
As the bike is to rely on the body's own driving force and cycling skills and driving, the frame will be able to bear the impact of cycling in the driving load and whether the comfort and safe delivery of the human body an important structure, frame parts manufacturing accuracy The pros and cons will directly affect the ride of the security, smooth, and light. In general, the spokes are equidistant, and in order to reduce the gravity, there are also made large, intermediate small diameter spokes, and in order to reduce air resistance,