Mount 1 or 2 bottle cages to your saddle with one of Tacx's cage mounts, ideal in a triathlon or time-trial when aerodynamics is key. With a cage mount and two water bottles at hand, it is much easier to stay hydrated. Mount 1 or 2 bottle cages to your saddle with one of our their mounts, ideal in a triathlon or time-trial when aerodynamics is key.