Aircraft pneumatic tire

An aircraft pneumatic tire comprising:

• a pair of bead cores (6);
• a radial carcass (7) including at least one carcass ply (7a) extending toroidally between both the bead cores (6);
• and
• a belt layer (10) that is disposed on an outer circumferential side of a crown region of the radial carcass (7) and reinforces the radial carcass (7), characterized in that
• the belt layer (10) includes
• a spirally wound belt layer (20) in which a ribbon-shaped first strip material (26) with a first belt cord (26a) including organic fibers and being covered with rubber has a spirally wound structure, and a prescribed plurality of layers (21, 22, 23, 24, 25) are laid on one another, and
• a zigzag belt layer (30) in which a ribbon-shaped second strip material (36) with a second belt cord (36a) including organic fibers and being covered with rubber has a structure of being wound and extending in a circumferential direction while bending zigzag by being folded back at width directional end edges (30a) to an outer circumferential side of the spirally wound belt layer (20),
• the first belt cord (26a) of the spirally wound belt layer (20) extends at an angle of equal to or less than 5° relative to a tire equatorial plane (CL),
• the second belt cord (36a) of the zigzag belt layer (30) extends at an inclination of an angle of 2° to 45° relative to the tire equatorial plane (CL), to folding back points (36b) where the second belt cord (36a) is folded back at each width directional end edge (30a) of the zigzag belt layer (30), and
• a relation of
• N95>N50
• is satisfied,
• where N50 is the number of stacked belt layers of the spirally wound belt layer (20) at a distance of 50% of half the length of a maximum belt width (Wb) of the belt layers (10) from the tire equatorial plane (CL), and
• N95 is the number of stacked belt layers of the spirally wound belt layer (20) at a distance of 95% of half the length of the maximum belt width (Wb) from the tire equatorial plane (CL).