Leaf springs for trailer suspension are laminated steel spring packs that flex under load to absorb road impacts and support axle movement. For semi-trailers, they work with hangers, shackles, equalizers, U-bolts and axle seats. Lucksun explains the mechanical suspension system and main trailer components, while its product catalog shows relevant trailer applications.

B2B buyers should specify spring type (multi-leaf, double-eye or slipper), free and installed length, width, leaf count, thickness, camber, eye/bushing size, center bolt, rated load per spring and axle spacing. Do not select by leaf count alone: geometry, material and suspension layout determine fit and capacity. Lucksun’s side-dump product lists a model with four 22 × 90 mm springs; this is a model-specific configuration, not a universal specification.

Compare skeletal trailers, flatbed trailers, trailer types and purchase-cost factors. Share drawings, axle rating, road conditions and destination regulations before confirming an OEM quote. Learn more about Lucksun’s manufacturing capabilities.