ATW Parabolic Suspension Kit

Parabolic springs have a slightly higher spring rate. This, with the right shock absorbers, will give more stability and a better ride to the vehicle at all speeds, on or off road.

Increased load capacity
Parabolic springs are modular. Separate leafs can be added, to increase load capacity, or removed, to lower the spring rate, without compromising the structure of the entire spring pack itself.



What is a parabolic spring?
Basically a Parabolic spring is a spring that consists of two or more leaves. The leaves touch only in the centre, where they are fixed to the axle and at the outer ends, where they are fixed to the vehicle. In between those two points the leaves do not touch each other as they do with conventional springs and are separated by urethane interleaf blocks to prevent contact and to further improve the ride quality by eliminating friction. Each leaf represents a complete spring in itself and will act as such. To enable this the leaf is tapered, from centre (thick) to the outer ends (thin). This tapering is called parabolic, it means that every centimetre the thickness of the leaf decreases in an amount that relates to the square function of its length. This may sound complicated but in fact it is very simple. Every single leaf will have, more or less, the same shape as a complete multi leaf spring and thus it’s capable of handling the same forces. This means that the ideal parabolic spring could have only one leaf; however, this type of “mono leaf” spring will have very limited articulation / weight ratio due to high internal stresses so a 2, 3 or 4 leaf parabolic spring can divide the stresses more evenly across the other leaves and thus more axle movement is possible. Another reason for increased leaves on a parabolic spring is to increase the rate (load capacity). Because every leaf spring is one spring we can add or take away leaves without compromising the strength of the leaf itself. So for example we have a 3 leaf rear spring and we ad