The tube after hydroformed become to fine and complex external shape with favorable strength for use on down tube. The down tube connects with head tube, top tube, seat tube and bottom bracket.
The tube after hydroformed become to fine and complex external shape with favorable strength for use on rear stay tube. The rear stay can be distinguished into seat stay and chain stay. The rear stay connects with seat tube and bottom bracket.
The tube after hydroformed become to fine and special shape with favorable strength for use on seat tube. This tube connects with top tube, down tube, rear stay and BB shell.
According to consumer demand to change the thickness of the tubes.Customers can choose plain gauge tube or butted tube which with two or three thickness in one tube
The wall thickness can be made by customer order.