Tuttio Adria26 Ebike Derailleur Hanger Bolt The Tuttio Adria26 Ebike Derailleur Hanger Bolt is a precision-engineered fastener designed to securely attach the derailleur hanger to the bike frame. Made from high-strength stainless steel or alloy steel, it ensures a firm connection between the rear derailleur hanger and the dropout area, maintaining accurate shifting performance. This bolt plays a critical role in protecting the bike frame — in case of impact or derailleur failure, the hanger absorbs the stress while the bolt holds the assembly securely, preventing frame damage. Please note that accessories require a short preparation period before shipment. The standard delivery time for accessories is approximately 9–12 days. For accessories, returns or exchanges are only accepted in the case of confirmed quality issues. We are unable to accept returns for reasons such as personal preference or incorrect purchase.