XLab Hydration System (Rear Bracket 2 / Transition Mount Pre-installed)Custom BiSaddle Mounting System This hydration system is the XLab Delta 200 with the carbon fiber gorilla bottle holder cage. It is custom designed to mount directly to the back of the BiSaddle Chrome moly and Titanium base frames using our rear bracket (included). (Does not work with the previous full BiSaddle Carbon Base Frame. Will work with updated 2023 carbon frame.) Adds an Extra Bottle The BiSaddle X Lab System is ideal for longer training