RELIABLE QUALITY - The hand truck replacement wheels are made of solid rubber, and the axles use thick iron painted with red lacquer. The replacement wheels are sturdy, durable, and wear-resistant. It is not easy to get flat or rusty. STEADY & QUIET - The flat free solid rubber wheels can move steadily on different surfaces, like lawns, carpet, ceramic tiles, concrete ground, wood floor, etc. The rubber tire also rolls quietly without making harsh noises.