Features: Made of high quality 7075 alluminum, lightweight, durable and precise. Ultralight and won"for t add too much weight to your bicycle. Easy installation, a direct replacement for the old or broken one. The appearance is simple,generous and colorful. Suitable for Rotor 130BCD Road Bike. Road Bike Chainwheel only,other accessories demo in the picture is not included. Specification: Material: 7075 Aluminum Optional Size: 50T, 52T, 54T, 56T, 58T, 60T 50T Size: app.20.9x20.9x1cm/8.23x8.23x0.39in 52T Size: app.21.6x21.6x1cm/8.50x8.50x0.39in 54T Size: app.22.5x22.5x1cm/8.86x8.86x0.39in 56T Size: app.23.3x23.3x1cm/9.17x9.17x0.39in 58T Size: app.24.1x24.1x1cm/9.49x9.49x0.39in 60T Size: app.24.9x24.9x1cm/9.80x9.80x0.39in Color: Black Quantity: 1 Pc Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package Contents: 1 x Road Bike Chainwheel When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''''''''t hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it