The Yakima Bigstack kayak stacker can be used to carry up to 4 kayaks on the roof of your car, truck, van, or SUV. The BigStack is primarily designed to carry white water kayaks as the hull of a white water boat is sturdier and can be tied directly onto a crossbar system without damaging the boat. If you are carrying recreational or touring kayaks it is best to use either a J-style kayak carrier
or a saddle style kayak carrier
The 8004041 BigStack rooftop kayak stacker includes a universal mounting hardware which allows it to mount on to a wide range of crossbar systems including Yakima, Thule, Round, Square, Aero, and most factory installed crossbar systems. When not in use the BigStack can be folded down to reduce the height of your rack system.