Difference between trailer leaf spring and truck leaf spring?

1. Load-bearing design

Truck leaf springs bear both vehicle dead weight + engine/cab + cargo, with larger instantaneous impact load during starting and braking. They adopt thicker single leaf and more layers for strong shock resistance.

Trailer leaf springs only undertake cargo and trailer body weight, no engine load. Most designs are lighter with thinner plates and fewer spring pieces.

2. Camber & flexibility

Truck leaf spring has smaller camber, stiffer performance to stabilize chassis under complex driving conditions.

Trailer leaf spring features bigger arc height and better flexibility to buffer bump on rough roads and protect cargo.

3. Mounting structure

Truck leaf springs connect vehicle frame and front/rear drive axle, matched with shock absorber installation holes.

Trailer leaf springs mostly fit semi-trailer suspension, commonly used for mechanical suspension and air suspension auxiliary assembly, different hole spacing and mounting center distance.

4. Service environment

Trucks run with frequent acceleration, brake and steering; springs need outstanding anti-fatigue property.

Semi-trailers travel mainly straight on highways with less frequent brake, focusing on uniform load dispersion.

5. Custom option

We support customized size, thickness and camber for both truck and trailer leaf springs according to client’s drawing.