Afar White 20" 24 Speed Dual Derailleur System Drive Family Foldable Tandem Bicycle 20" CR-MO(Chromium Molybderum) Alloy Steel Foldable frame,Rear Suspension Dual Derailleur System,Patented Independent Pedaling System.24 Speed Assembled Dimension(LxWxH) 82.6"x19.6"x43" Folding Dimension (LxWxH)34.6" x 11.8"x 34.6 N.W.-52LBS,Strong Frame can take weight totally upto 800lbs