The AM Bicycle Chain Guide CG04 is crafted from ultralight, high-strength Aluminium Alloy, ensuring durability and performance. This chain guide is perfect for 1x drivetrain systems, providing reliable chain retention and smooth shifting. It features a high-quality CNC machined finish for and aesthetics. The CG04 model includes a Mount Adapter for easy installation on BSA 68mm standard frames and uses superior bearings for the guide wheel to enhance performance and durability. Specifications: Material: aluminum alloy Spec: mount / ISCG-05 Range: round: 32T-38T Mount Adapter Installation: Adapter replaces spacer, fits BSA 68mm standard frame Adapter Thickness: about 3mm Center hole diameter: about 35mm Color: Black Material: Aluminum Alloy Package Contents: 1* chain guide Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.