Heavy Duty Plug-In CartThe Hobie Heavy Duty Plug In Kayak Cart works with any Hobie model kayak and makes it easy to transport your kayak to and from the water. Heavy Duty Plug in Kayak Cart has a much higher capacity and tires with tread that are more rugged than the standard plug in cart or the Trax carts. Foam wheel inserts give this cart a high capacity and will never go flat. Plugs into the scupper holes on any Hobie kayak.