Description: Thickened design brings higher strength to the chainring. Aluminium alloy structure and hollow design makes it lightweight while ensuring high strength and wear resistance. Guide chain slot makes it not easy to drop chains and brings a quick and smooth shifting. Anodic oxidation process and frosted surface design makes it anti-oxidize and corrosion resistant. Made of high quality aluminum alloy material, it is waterproof and anti rust. A set includes different styles. It's suitable for road bike. The four pin bolt design makes it stable and not easy to drop chains. Item Name: Chainring Material: 6061 Aluminum Alloy Specification: 56T/44T Compatibility: 8/9/10/11 Speed Features: Wear-resistant, CNC Craftsmanship, Lightweight Size Details: Large Chainwheel Diameter: 23cm/9.06" (Approx.) Small Chainwheel Diameter: 18.2cm/7.17" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Large Chainring 1 x Small Chainring