Features 1、Applicable Model: BCD can support 110mm / 4.3in, 130mm / 5.1in, oval disc chainring can improve riding efficiency, suitable for road bikes, folding bikes. 2、High Strength Aluminum Alloy: Good compression resistance, waterproof, moistureproof, not easy to rust, thickened aluminum, strong and durable. 3、Integrated Molding: Integrated molding, CNC cutting, precise tooth shape, not easy to drop the chain, perfect for your outdoor cycling. 4、Surface Treatment: Anode coloring will form a layer of film on the surface of the disc, which greatly enhances its anti oxidation ability. 5、Positive 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. Item Type: Oval Disc Chainring Weight: Approx.260g / 9.2oz Material: Aluminum Alloy Product Style: 52T (110/130 BCD) BCD: Approx.110mm / 4.3in, Approx.130mm / 5.1in Speed: 7/8/9/10 Speed Product Application: Road Bikes, Folding Bikes Package List 1 x Bicycle Oval Disc Chainring