2 Leaf Parabolic Spring 2/4PD

The Automann 43-694 parabolic spring is a two-leaf, 2/4PD (pad arrangement) suspension spring built for strong truck duty. Parabolic leaf springs taper in thickness to reduce weight while concentrating strength where needed, improving ride compliance and reducing fatigue. This spring is engineered to carry heavy loads while enhancing comfort and durability in long haul or vocational use. It features optimized curvature and taper to balance bending stress, minimize interleaf friction, and reduce NVH (noise, vibration, harshness). Many fleets prefer parabolic designs because they provide better ride quality compared to traditional multi-leaf sets, yet still deliver required load capacity. Use the 43-694 in front or rear suspension assemblies where 2-leaf parabolic design is specified. With cross-reference compatibility and a trusted brand backing, it's a reliable replacement in rebuilds or upgrades.