A system to expand and optimize on-bike storage Mounting Bases are the heart of the BRAD system and are available in three sizes Bases can shift a bottle cage away from inconvenient rear shocks, add room for tools or tubes below a bottle cage, or even provide space for a second bottle on sufficientlylong downtubes Various BRad accessories are available separately to complete the system Total length for reference in frame fit: #2 base 13.2cm; #3 base 20.5cm; #4 base 30.8cm