... fair on 2011 2> Have done mass production Alloy cruiser bicycle frames1> Type: 26",28" frame2> Surface:paint3> Material:Aluminum/alloy ... :1,Lightweight material,high strength,high toughness.2,Head tube,top tube,down tube,Seat stay,chain stay,all parts could change the ... directly,and all detail we could negotiate again,thks ! Cruiser bicycle frames aluminum 6061