Ridea FCAR1 is installed in the frame, just below the seatpost. It allows you to install an extra bottle cage for those long day rides.
Model name: Ridea FCAR1
Compatible Birdy frame: Mark 2 (2006 to 2015) & Mark 3 (2015 to present)
Material: CNC and forged alloy
Weight: 39 g
Colors: black, red, gold, silver, Ti-gray