The Ruk Sport Sit on Top Trolley has been designed for transporting sit-on-tops with ease. Built with an adjustable pair of scupper prongs the Sit on top Trolley can be mated to almost any sit-on-top kayak just adjust the width and slide the prongs in the scupper holes for a secure fix and Very compact. i.e. to allow easy storage in your kayak so you don't have to leave them on the beach. Latest model with solid pu wheels.