All Ironman 4×4 coil springs are CNC Cold coiled to ensure perfect consistency and accuracy. The result of cold coiling means that springs are subjected to less heat during the manufacturing process to help maintain the materials properties and resulting in longer life.
Bar peeling is the process of forming the material to an exact size before coiling. This ensures the diameter remains constant and free of flaws along its entire length.
Manipulates material surface tension to reduce stress, greatly enhances spring life.
Each coil is fully compressed to a solid state 3 times to minimise coil settling.
PROGRESSIVE AND LINEAR RATE
Used in accordance with original vehicle manufacturers preference, progressive springs increase rate as the spring compresses, linear springs maintain a consistent rate throughout its range.
All springs are electro-static powder coated for a durable finish.