I use my truck bed with extender. My kayak is a 10’ one and I had to have my extender cut and shortened to fit the kayak better. The way it is molded the regular extender didn’t even touch it. Other than needing to redo my padding on the extender no problems, easy peasy. I’ve hauled it before in full size truck and no extender needed. Probably not necessary on mine but gives kayak a little more support.