Features1Applicable Model: BCD can support 110mm / 4.3in, 130mm / 5.1in, oval disc chainring can improve riding efficiency, suitable for road bikes, folding bikes. 2High Strength Aluminum Alloy: Good compression resistance, waterproof, moistureproof, not easy to rust, thickened aluminum, strong and durable. 3Integrated Molding: Integrated molding, CNC cutting, precise tooth shape, not easy to drop the chain, for your outdoor cycling. 4Surface Treatment: Anode coloring will form a layer of film on the surface of the disc, which greatly enhances its anti oxidation ability. 5Positive and Negative Teeth Design: The design of positive and negative teeth, using thick and thin design, so that positive and negative teeth of the plate just match the outer and inner chains of the chain, which can solve problem that the chain would be dropped without forward dial.SpecificationItem Type:OvalDiscChainringWeight: Approx.260g / 9.2ozMaterial: Aluminum AlloyProduct Style: 52T (110/130 BCD)BCD: Approx.110mm / 4.3in, Approx.130mm / 5.1inSpeed: 7/8/9/10 SpeedProduct Application: Road Bikes, Folding BikesPackage List1 x BicycleOval Disc Chainring