Abstract: This paper proposed a new kind of airless plastic tires in which a polyurethane spoke was combined with a rubber tread. By using finite element software ABAQUS under static load conditions the grounding performance and mechanical performance of such airless plastic tires were analyzed and compared. Compared with radial rubber tires, the airless plastic tire was more reasonable, grounding pressure distribution along the lateral tread was more uniform, which reduced the wear at the tire shoulder. Radial stiffness of airless plastic tires was significantly higher, and the deformation of support plates in the grounding area played an important role in buffering and bearing, which made the drive more comfortable.