steel bicycle fram top tube diametre 25.4*0.9T down tube diametre 28.6*0.9T seat tube diametre 28.6mm* 0.9T

bicycle frame  : 

                           top tube diametre 25.4*0.9T  

                             down tube diametre 28.6*0.9T         

                             seat tube diametre 28.6mm* 0.9T

                            height of top tube 545mm       

                              height of down tube : 620mm         

                             height of seat tube :  525mm

 

                             Material : CR-MO 4130

                            the joint is investment casting

steel bicycle frame