A Parabolic Z-Spring suspension system is composed of components that are designed, created and assembled together in a manner that every component works together to soften the effects of rough road conditions, improve the comfort of the ride and protect other parts of the vehicle by absorbing and reducing the shocks and vibrations. This improved driving condition makes vehicle handling easier which ultimately improves safety. The right suspension system also allows a vehicle to stay grounded which further improves handling and safety.

Stabilizer Bar is one of many components which helps to reduce the body roll of a vehicle during high speed cornering or over road irregularities. It connects opposite (left/right) wheels together through short lever arms linked by a torsion spring. The stabilizer bar extends across the front underside of the chassis and connects to the frame cross member. The ends of the bar are mount to the lower suspension arm. All mounting points of the stabilizer bar are isolated by bushings.

Lift axles are non-power axles and are used in most commercial vehicles in order to increase their load bearing capacity. These axles are movables axles (up or down) i.e. can be lifted up or deployed as per the load on the vehicle or the road condition. Lift axle contributes to improve fuel economy and reduces maintenance and tyre wear.

Lift axle can be mounted in-front or behind the drive axle. The lift axle which is mounted in-front of the driving axle is called "Pusher type lift axle" and the lift axle which is mounted behind the driving axle is called "Tag type lift axle".

JAI was instrumental in introduction of Parabolic Springs in India in 1988 for the passenger cars and have now pioneered the same for Commercial Vehicles. This technology not only reduces the weight of the springs but also improves the ride comfort and extends the vehicle life.