A long, thin, narrow strip of steel curved in a semi-elliptical arc and connected at each end to the vehicle's frame. Usually, more than one strip is used to form a multi-leaf spring. Rugged and simple in design, leaf springs are extremely flexible, are able to be layered according to weight application and are designed to support heavy loads. The rear leaf springs on Tundra and Tacoma 4x4 and PreRunner models are located above the axle for added ground clearance.