These are the leaves on which the section changes in parabolic shape. They are produced by parabolic taper rolling process. They provide comfort on flexible loads and give a lighter option than conventional leaf springs because of the ability to work with less leaves.

Air linkers are manufactured with parabolic leaves where the "Z" or linear shape is given. They are used in air suspension applications.

These are the leaves on which the thickness is stable. They are suitable for damaged roads and over loading. The complete sets are produced upon assembling the leaves where the length changes rankly, with the help of assembly parts like bolts, clamps,etc..