Features: Crafted from premium high strengths aluminum alloys, this central lock disc cover ensures secure fitment while maintaining light weight durability for enhanced bicycles brake performances and longevity. Designed with universals compatibility for 9mm, 12mm, and 15mm axles hubs, it seamlessly integrates with road bikes, offer reliability stability across diverse cycling setups. Ideal for cycling enthusiasts and mechanics seeking robust solution for frequent bike maintenance or performances upgrades on demanding terrains. Perfect for descents, or commutes, it prevents disc loosening during intense braking, ensuring cyclists safety in dynamic environments. The simple installation systems simplifies setups, allowing quick adjustments to optimize braking efficiency and deliver a smoother, confidence inspiring ride experience. Specifications: Color:Five Choices Dimension:44.1x8.5mm/1.74×0.33in Component:Aluminum alloys Package Includes: 1pc disc lock cover note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.