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Leaf spring originally called laminatedor carriage spring,a leaf spring is a simple form of spring ,commonly used for the suspension in wheeled vehicles.

Leaf spring are used in heavy commerical vehicles such as vans and trucks ,trailers ,SUVs and railway carriages,for heavy vehicles ,they have the advantage of spreading the load more widely pver the vehicle`s chassis.

Leaf spring also locate the rear axle ,eliminating the need for trailing arms and a panhard rod ,thereby saving cost and weight in a simple live axle rear suspension.