The swingarm is a key component of a motorcycle's rear suspension system. It connects the rear wheel to the motorcycle’s frame and allows the wheel to move up and down independently of the chassis. This pivoting action absorbs shocks and maintains stability, improving ride comfort and handling. The swingarm is typically made from aluminum or steel for strength and durability. It is mounted on the motorcycle's frame with a swingarm spindle or axle and is linked to the rear suspension system via a shock absorber or linkage.