Frame:12" steel,T/T:38mm,D/T:38mm,S/T:28.6mm Fork:steel,25mm Head parts:Steel B.B. Parts:Steel and one piece crank Brake:Rea Frame:12" steel,T/T:38mm,D/T:38mm,S/T:28.6mmFork:steel,25mmHead parts:SteelB.B. Parts:Steel and one piece crankBrake:Rear coaster brakeTire:Tire:Air tire,12*2.125Rim:Steel,16H