1. Robustness and Lightweight Design: The chain guide adapter is made of durable CNCmachined aluminum alloy, which is both longlasting and lightweight. It undergoes heat treatment and anodization to enhance durability for longterm use. 2. Compatible with ISCG03/05 Chain Guides: This adapter is designed to be compatible with ISCG03/05 chain guides. It can be easily mounted on 68/73mm bottom bracket shells, including threaded bottom brackets such as ForBB50/BB51/BB70 (not compatible with pressfit bottom brackets). 3. Precise InstallationFor proper installation, the vertical adapter mount should be positioned perpendicular to the horizontal plane. This ensures a secure fit and performance. 4. Durable and Reliable Crafted from strength aluminum alloy with a CNC finish, this adapter is built to withstand tough riding conditions. It provides a reliable chain guide conversion while maintaining the bike's lightweight construction.