This study presents a bio‑inspired passive suspension design for track‑based robots aimed at improving trafficability and ride comfort, which are critical for mobility and reliable operation, especially when carrying sensitive equipment. Drawing inspiration from the limb structures of animals and insects, the robot is equipped with innovative passive “leg” mechanisms that connect the load‑carrying wheels to the body. These structures provide high load capacity while maintaining low dynamic stiffness, enabling effective traversal of rough terrain in a manner similar to multi‑legged biological systems. The proposed design significantly enhances mobility and riding comfort without sacrificing payload capability, offering a stable, high‑performance robotic platform suitable for diverse and challenging environments.