2012 new types BMX bicycle: 1.argon-arc welding 2.Full equipment,professional skill 3.The bigger factory 4.Excellent process 2012 new types BMX bicycle:Rim Size: 12", 14“, 16" ,18”, 20"Frame: steel and painting, thicker argon-arc weldingFork: steel and painting, co2 welding steel /suspension forkRim: steel ,alloy or aluminumHandlebar and stem: CP, argon-arc welding Tyre 1.75 or 1.95 tyre tube: ...