1. STRENGTH MATERIAL: These road wheel hubs are crafted from strength aluminum alloy and feature a fully anodized hub body, delivering exceptional corrosion resistance. This treatment enhances wear resistance, conductivity, and reflectivity while also improving aesthetic appeal. 2. ULTRALIGHT HUBS: The hubs are designed with a hollow structure and a construction, reducing weight without compromising strength. The front hub weighs just 138g, the rear hub approximately 265g, and the complete hub set has a net weight of only 403g. 3. HG RUNNING: The HGsystem freewheel incorporates 4 strength pawls, ensuring and disassembly. The ABG antiseize cassette body is more and integrated into the aluminum alloy freewheel, minimizing wear between the flywheel and cassette body to extend service life. 4. SEALED BEARINGS: The front hub is equipped with 2 sealed bearings, while the rear hub features 4. These bearings provide smooth, quiet rolling with low friction and rigidity. The strong sealing effectively blocks water, mud, and debris, ensuring a fast and effortless ride.