Parabolic or Tapered leaf springs are a popular choice for new and used vehicles. The Parabolic spring allows the suspension designer to achieve a higher degree of efficiency; this is obtained via a reduction in the springs mass. The mass reduction and the parabolic profile will decrease the resistance in the initial deflection of the spring, making the suspension system more responsive to dynamic forces. Now, the suspensions added dynamic forces also decrease the vehicles stability and control.

Fireflex Parabolic Springs have increased spring rates and capacities to provide greater control while maintaining a high level of comfort. However, Multi-leaf springs are sometimes used to replace a Parabolic Spring, this is endorsed in the cases where a parabolic style spring can not improve the vehicles handling and load capacities.The team at Fireflex can design and supply many styles of Multi - leaf springs for these purposes.

High carbon alloy steels are used to achieve the desired through hardness required during the heat treating process, they also increase the stress range of the spring when in service.

Quality Steels - 51CrMoV4 - High Carbon Alloy Spring Steel - Chromium, Vanadium, Molybdenum and Manganese. 50CrV4 - High Carbon Alloy Spring Steel - Chromium, Vanadium and Manganese. Parabolic Spring material thickness can range from 16mm to 60mm in the centre and taper down to approx 12mm to 18mm on the ends.

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