What's the difference between a bicycle shaped tube and a round tube? Do you see that the frame is round or round? See the frame is flat, it is shaped tube? Which is good?
Round tubes, square tubes, elliptical tubes, all of which are not shapedAbnormal shape is irregular shape, such as: one is water drop, and the other is squareOne is round, one is gem shaped, and the other is shaped tube.As the equipment improves technically, it can now be made of bamboo tubes, fish head pipes and so on
From the mechanical point of view, the circular hollow pipe material used in the case of the stiffness (anti deformation capacity). Therefore most of the pipes are circular. But the circular pipe feels some boring, for beautiful, modern bicycle uses a special pipe (tube even a rough, oval, a fine). This approach is entirely at the expense of material weight index and cater to the human aesthetic point of view.
It's not round, it's all shaped tubes.City running doesn't care if it's shaped, you don't know how big it is to ride.
