The Heavy Duty Central Lock Disc Cover for Mountain Bike 9" - 15" Thru-Axle Hubs provides a secure and innovative solution for riders who need to securely mount their disc brakes to their mountain bike frames without compromising the 6-bolt rotor design. Made of durable, sturdy materials, this disc cover features a central locking mechanism that allows for quick and easy installation, even in challenging conditions. Its ergonomic design ensures a comfortable fit, while the 6-bolt brake holder mounts directly to the frame, keeping the disc pad plates and levers in place while preventing the disc rotors from falling off during use. Plus, the disc cover is compatible with a wide range of wheel sizes, making it an ideal choice for both seasoned riders and those just starting their mountain biking journey. So, whether you're looking for a reliable and efficient way to secure your disc brakes or need a versatile option for different wheel sizes, the Heavy Duty Central Lock Disc Cover for Mountain Bike has you covered.