Stewart r1 push trolleybuilding on the outstanding success of the z1 and z3 push trolleys that have been on the market since 2010 the all new r1 push is ready to take its crown as the best push trolley in the world during an intensive design and development process every component in the r1 push has been specifically created for its purpose not a single component is carried over from the z3 or borrowed from any other trolley whatrsquos more the r1 push is the only three wheel push troll