Kink 2021 Pump 14" BMX Bike. While 14" bikes are not all that common, the Kink Pump 14" bike fills an important role in the Kink lineup. Kids are not only getting into BMX at an earlier age, they are also progressing at an even earlier age and for that need a proper fitting bike as they grow. The Pump 14" fits perfectly between 12" and 16" bikes and is built with proportionate geometry and components suited to this age and height rider. Small details like the Mission Micro brake lever are considered carefully to ensure everything is of proper fit and function on this bike. The reduced angle of the Weider seat also means kids can sit down and ride comfortably.