Greenball Mini Master AT18/8.00R8 tire (Acura – Explorer – 1930). Greenball Mini Master AT18/8.00R8 tire For over forty years we’ve dedicated ourselves to meeting our customer’s needs and demands. By offering a wide selection of tire products accompanied with efficient and friendly service, Greenball has proven to be a reliable business partner for customers at the retail, wholesale and OEM levels. All these elements together allow us to create opportunities that help our customers sell more products to a greater range of clients.