Abstract: The invention is directed to a high aspect ratio agricultural pneumatic tire having a tread, a belt reinforcing structure and a carcass. The tread includes a circumferential inner tread and a plurality of lugs each projecting radially outward from the inner tread. The belt reinforcing structure includes four or more belt layers reinforced by synthetic cords and underlying the tread. The carcass has a pair of bead portions each having a core and a bead filler above each bead core and two pair of first and second carcass plies. Each ply is reinforced by synthetic cords oriented radially and wrapped from the inside of each bead core around to an axially outer turnup end. The first pair of plies is radially inward and adjacent the second pair of plies between the bead cores and having the turnup ends wrapped about the bead cores and the turnup end of the second pair of plies.