Why would I want a J-Cradle or Stacker mount? Raul Bonifacio Updated July 16, 2017 12:49 Follow Our J-cradles and Stackers give you the best space-saving solutions, letting you carry multiple boats on their sides. Related articles How can I make it easier to put a kayak on the roof of my vehicle? When should I use a Bow / Stern tiedown? How do I lock my kayak to my vehicle? I need instructions for my Watersports Mounts, where can I find them? What do I need to know about SUP and Surf Mounts? Comments 0 comments Article is closed for comments.