Item: Full suspension frame Model: MB056 Size: 16',18',20',21.5'(C-T) Seat tube: 31.6mm Item:Full suspension frame(26')Model:MB056 Size:16',18',20',21.5'(C-T)Seat tube: 31.6mm Material:Full carbon (T700)App:3K/UD Weight:1700±40g (18') Head set:Top:1-1/8" Down:1-1/8" NOTE:1.ENG BB 1.37*73mm 2.Alloy stopper 3.Alloy dropout 4.External cable routing 5.Exc shock