FRAME: steel & TIG welding FRONT FORK: steel DERAILLEUR: yes WHEEL SETS: 26'' FRAME: steel ... large manufacturer for 6 years, specialized in all types of MTB, BMX, City Bikes, Racing Bikes, Bicycle Frames etc, ... report of CE & ISO9001. We have our own frame, fork and tyre factory, TIG welding plant, phosphating pool, stoving ... , Vietnam, Malaysia, Dubai, Turkey, etc. Tianjin Ocean Bicycle MTB cycle