A leaf spring for use in a vehicle suspension , comprising: - a lower surface configured to face downwardly towards the ground when used in a vehicle suspension, - an upper surface which is located opposite to the lower surface and which is configured to face upwardly when used in a vehicle suspension, - a first end configured to be mounted closer to a front end of a vehicle, - a second end configured to be mounted closer to a rear end of the vehicle, wherein the upper surface and the lower surface extend longitudinally from the first end to the second end, - an axle attachment portion located between the first end and the second end, the axle attachment portion being configured to be attached to an axle such that the longitudinal extension of the upper and lower surface of the leaf spring is directed transversely to the axle, - a first upwardly facing convex portion formed between the first end and the axle attachment portion, and - a second upwardly facing concave portion formed between the axle attachment portion and the second end, wherein the second upwardly facing concave portion is formed by: - a first subportion , which extends downwardly from the axle attachment portion to a lowest point of the second upwardly facing concave portion, and - a second subportion which extends upwardly from said lowest point to the second end , wherein the extension of the second subportion forms a curved path from said lowest point to the second end , characterized in that the smallest radius of said curvature is smaller than any radius of curvature of the first subportion . - a lower surface configured to face downwardly towards the ground when used in a vehicle suspension, - an upper surface which is located opposite to the lower surface and which is configured to face upwardly when used in a vehicle suspension, - a first end configured to be mounted closer to a front end of a vehicle, - a second end configured to be mounted closer to a rear end of the vehicle, wherein the upper surface and the lower surface extend longitudinally from the first end to the second end, - an axle attachment portion located between the first end and the second end, the axle attachment portion being configured to be attached to an axle such that the longitudinal extension of the upper and lower surface of the leaf spring is directed transversely to the axle, - a first upwardly facing convex portion formed between the first end and the axle attachment portion, and - a second upwardly facing concave portion formed between the axle attachment portion and the second end, wherein the second upwardly facing concave portion is formed by: - a first subportion , which extends downwardly from the axle attachment portion to a lowest point of the second upwardly facing concave portion, and - a second subportion which extends upwardly from said lowest point to the second end , - a first subportion , which extends downwardly from the axle attachment portion to a lowest point of the second upwardly facing concave portion, and - a second subportion which extends upwardly from said lowest point to the second end , wherein the extension of the second subportion forms a curved path from said lowest point to the second end , characterized in that the smallest radius of said curvature is smaller than any radius of curvature of the first subportion . <EOS>