The road wheels of the K9 Thunder self-propelled howitzer are crucial components located at the lower part of the vehicle. They support and guide the tracks, ensuring smooth and stable movement. The K9, a South Korean self-propelled artillery system, relies on its road wheels to absorb shocks and maintain track tension, which allows it to traverse rough and uneven terrain effectively. This robust road wheel system helps the K9 maintain high mobility and operational efficiency, even under heavy load and during rapid maneuvers.