- Size: Wheel diameter is 56 mm (2.2 inches); overall height is 70 mm (2.76 inches); groove width measures 20 mm (0.79 inches); hole diameter is 7 mm (0.28 inches); mount length is 90 mm (3.54 inches); mount width is 40 mm (1.57 inches); hole spacing is 28 x 77 mm (L x W); load capacity per wheel is 300 kg (661 lbs). - Material: Constructed from galvanized carbon steel, these wheels provide exceptional strength and load-bearing capabilities. They are designed for durability, featuring high hardness and wear resistance, making them suitable for heavy loads up to 300 kg. - Features: Our sliding door wheels offer a smooth, effortless rolling action, allowing seamless movement along tracks. This design ensures stability while reducing friction due to wear and corrosion, making them ideal for both indoor and outdoor applications. - Applications: These pully bearings can be used for various sliding door types and mechanical drive devices, including industrial gates, commercial gates, residential gates, barn doors, automatic sliding doors, aluminum doors, pulleys, drawers, wheelbarrows, and garden carts. Incorporate these wheels into your sliding door systems for reliable performance, durability, and ease of movement, no matter the setting. Whether upgrading your home or equipping a business, these wheels are a practical choice for ensuring smooth operation under heavy loads.