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Quality Material: This bicycle disc adapter is made of high quality alloy, anti-corrosion and resistant to deformation. Easy Installation: This bike disc adapter comes with screws for assembly, which is easy to install without any other installation tools required. Portable and Durable: This B-R-203 replacement mount is lightweight and durable for long-term use with confidence. EFFECTIVE REPLACEMENT: This bicycle disc adapter is a good replacement part for bicycle repairs. It is the choice of most people because of its high strength and high cost. Application: This mountain bike disc brake adapter fits the B seat and can be mounted on the B-R203 front fork with a 203mm (8") disc.