The Pilo Derailleur Hanger - D21 is designed for compatibility with Conway, Gary Fisher, Klein, Schwinn, Silverback, Trek, and Vitus bikes. It offers a durable solution for replacing old or damaged derailleur hangers. This hanger is easy to install and ensures smooth gear shifting and reliable performance. If the specific hanger you need isn't available, you can pre-order it from the Pilo International website for delivery in about 1-2 weeks.