The SKS Anywhere Bottle Cage Adapter really lives up to its name. You can mount it anywhere on the bike frame, even where there are no mounting holes. Its rubberised straps provide a firm and stable fit to tubes of any shape in diameters between 50 and 80mm. The velcro fastening means it can be removed in seconds. Adapter only. TOPCAGE bottle cage not included. SKS Anywhere Bottle Cage Adapter Features This is the adapater only. Does not include Topcage Bottle Cage. You can mount it anywhere on the bike frame, even where there are no mounting holes. Rubberised straps give a firm and stable fit to tubes of any shape in diameters between 50 and 80mm.  The velcro fastening means it can be removed in seconds.