XUEMEI Bike Chain Holder: New high quality Introduction: This bike chain holder is designed to protect the bicycle chain and frame when the rear wheel is removed for transportation. The quick-release mechanism allows for fast and easy installation and removal, helping to maintain proper chain tension during cleaning or transport while preventing scratches caused by chain-to-frame contact. The roller body is constructed from durable nylon with built-in bearings, ensuring smooth rotation and preventing damage to the chain. Unlike non-rotating plastic alternatives that can cause wear under high tension, this rotating design moves with the chain to reduce friction and protect your drivetrain. Installation is simple and similar to reinstalling the rear wheel. Adjust the rear dropout so the guide wheel and roller are aligned horizontally, then securely lock the quick-release mechanism. Be sure to correctly position the two washers during installation. Size: 7 x 6.5 cm (2.76 x 2.56 inches) Notice: 1. Please allow 1-3 cm error due to manual measurement. Ensure you are comfortable with this variance before purchasing. 2. Due to differences in monitor displays, the actual color of the item may vary slightly from the image. Thank you for your understanding. Package includes: 1 x Bike Chain Holder