These hubs are manufactured from a high-performance carbon composite material, providing a lightweight upgrade with increased rigidity and reduced flex. The enhanced stiffness delivers a more direct handling feel. Key Features and Specifications: Manufactured using premium TORAYCA® carbon fiber material Increased rigidity compared to standard glass fiber nylon arms Reduced flex under high loads for improved handling precision and response Lightweight Direct bolt-on replacement for standard parts Includes: x1 Rear hub, Standard, carbon x1 Rear hub, HRC, carbon x4 Hub Spacers, 0.50mm, carbon x4 Hub Spacers, 1.00mm, carbon Note: This item includes one of each hub style: Standard and HRC. If you need a pair, you must order two of this item.