Big off a 4x tractor, all hold air, contain some calcium, size: 8 bolt 30 inch wheel size: 16.9-30 on 15" inch rim 14-30 6 ply rating made in canada nylon c-1 mbdl-5 be 311(x6or8, Like in the picture)5-1 Field and road gum dipped (with firestone logo in the middle)