An air spring sleeve. The sleeve comprises an elastomer body having two
plies. Each ply comprises a cord embedded in the elastomer body. Each
cord is wound about the sleeve in an opposing direction from the other
and each having a helix angle. The first cord helix angle and the second
cord helix angle comprise a cord differential helix angle. The first or
inner cord helix angle is greater than a second or outer cord helix
angle. The cord differential helix angle is in the range of approximately
0.degree. to 2.5.degree..