This 3502-80GB30-091 rear lower brake shoe assembly is a lower brake shoe with friction lining for Dongfeng heavy truck rear drum brake system. When braking, the camshaft pushes the brake shoe outward to press against the brake drum, generating friction braking force to slow down and stop the vehicle. The shoe frame adopts cast steel structure with high rigidity and deformation resistance. Friction lining is non-asbestos material with stable friction coefficient, good wear resistance and thermal fading resistance. Rivets are firmly fixed between lining and shoe web. Each assembly undergoes appearance inspection, dimension test and friction material inspection before delivery. It is an essential replacement spare part for rear axle drum brake overhaul.