Package includes: includes 2 bicycle disc holders; supports upgrading from ordinary bicycles to disc brake bicycles; mounting diameter: 22 mm. HIGH QUALITY: The disc brake bracket is durable, strong, anti-deformation, beautifully designed, easy to install and remove, suitable for most bicycles. Easy to use: The modified bracket is easy to install and to use, no complicated tools are required, the bike rack is not only suitable for ordinary bicycles, but also for disc brake bicycles, making it convenient to use. High performance: the bracket can turn an ordinary bicycle into a disc brake bicycle, giving you a new riding experience. The bicycle rack can be converted into an ordinary bicycle disc brake, easy to use. Application: The bicycle mounting bracket gives you a new riding experience, suitable for many types of bicycles . : BMX, mountain bike, mountain bike, etc. Note: The data is all recorded manually, please allow 1-3cm error due to differences in light and display, there may be some differences color, please refer to the actual item received.