Bicycle V Brake Extension 406 To 451 Converter Adapter Extender Pivot Frame Screws Kit Bicycle Accessories Features: 1.The main body made of aluminum alloy, light weight and high strength. 2.Easy to remove and insert. 3.If you want to change the small wheel into a big wheel,the brake can solved the position. 4.Brake adapter for:14 inch modified 16 inch/16 inch modified 18 inch/18 inch modified 20 inch/20 inch changed 451 wheel set. 5.If you need to modify front and rear, then you need to buy two sets. Specifications: Color: black, red Material: 7075 aluminum alloy Size: 4125mm/1.61"0.98" Note: Transition: 1cm=10mm=0.39inch 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 Includes: 1set V Brake Extension Rack About Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and we"ll make you feel satisfied. 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