Editing Suspension: designs, shapes, sizes (section)
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====Spring types==== =====Coil spring===== A large coil-type spring which sits in perches on both the suspension components and the frame or frame member. This type of spring acts like any small coil spring and can have a progressive or linear spring rate through the use of different spring overall length, number of coils, wire diameters and coil spacing. =====Leaf spring===== Curved steel "leaves" are packed together to achieve one unified pack of curved leaves which resists being bent further or straightened. With the weight of the vehicle on them, this resistance to being straightened is what supports the vehicle and keeps the wheels on the ground when going over bumps. =====Coilover===== A coil spring and shock absorber combined in one unit, often made adjustable to allow suspension feel and/or ride height fine tuning. =====Torsion bar===== The spring action is created by a beam that (usually) runs across (left to right) the vehicle. Within this beam is usually two spring steel rods that are joined to the housing beam in the middle and have each end connected to a pivot arm that joins onto the wheel hub of both sides. Therefore as the weight is put on the suspension the spring steel rods will 'twist'. This method is used with a shock absorber mounted separately and often means that the ride height of the vehicle can be adjusted.
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