- PRODUCT SIZE: The hub mounting hole distance (center to center) measures approximately 78 mm (3.07 inches), with a center hole diameter of approximately 22 mm (0.87 inches). Designed for 3 lug hub live axle go-karts. - HIGH-QUALITY MANUFACTURING: Expertly crafted by skilled professionals, this rear wheel hub ensures exceptional quality and stable performance. With precise processing and exquisite workmanship, it offers high reliability for 3/4 hub wheel karts. - DURABLE ALUMINUM ALLOY MATERIAL: Constructed from premium aluminum alloy, this rear wheel hub is lightweight yet strong. It is resistant to wear and corrosion, manufactured under strict quality control standards, and features an improved design for extended service life. - COMPATIBILITY: This rear wheel hub is designed to meet original factory specifications, making it a perfect fit for four-wheeled motorcycles, ATVs, and dune karts. Please verify compatibility with your vehicle before ordering to ensure proper fit. - EASY INSTALLATION: The user-friendly design allows for straightforward installation and replacement without the need for complex tools. Simply remove the original hub and replace it with this one for a hassle-free process. Use Scenarios: 1. Upgrade your go-kart with this reliable rear wheel hub for enhanced performance during racing or recreational driving. 2. Replace worn-out hubs on your ATV or dune kart to restore optimal handling and safety on rugged terrain. 3. Ideal for DIY enthusiasts looking to maintain or improve their four-wheeled motorcycle's performance with high-quality components.