Steep slope performance: The large-diameter driving wheels with anti-slip patterns enable easy crossing of thresholds and do not get stuck on carpets. Wear-resistant material: High elasticity and wear-resistant rubber wheel cover. It won't crack or wear thin even after long-term and high-frequency walking. Anti-aging property: The wheel body is added with anti-aging materials, ensuring that it remains hard and does not crack even after long-term exposure to sunlight. Long-range endurance compatibility: Low-resistance smooth bearings, with less walking friction, reducing power consumption and extending the cleaning duration. Anti-clogging feature: The protruding guard on the wheel prevents small stones and paper scraps from getting stuck in the wheel shaft gap.