Feature: 1. Made of aluminum alloy, wear resistant, deformation resistant, and high strength, the appropriate thickness can ensure that they will not bend. 2. The ergonomic round shape can reduce the load and fatigue of the legs or knees and ensure a smoother ride. 3. The unique shape design increases the contact area of the chain, improves the grip, and reduces the chain sag, easily pass through uneven roads. 4. Narrow wide design ensures that the chainring is fixed, effectively protects frame from scratches, and reduces friction and noise. 5. The front derailleur is removed, the load on the bike is reduced, the chain can not be dropped, and the riding is more comfortable. Specification: Item Type: Bike Chainring Material: Aluminum Alloy Product Size: (Allowable Error of Manual Measurement) Outer Diameter: Approx. 136mm / 5.4in Adjacent Aperture: Approx. 74mm / 2.9in Diagonal Aperture Approx. 104mm / 4.1in Number of Teeth: 32T Applicable Reference: 32T Single Chainring is A Common 104 BCD Chainring, Suitable for XC off Road (Without Expansion Chainring) or AM FR DH Heavy Duty Bikes In Steep Slopes. Package List: 1 x Bike Chainring Note: Carefully observe the teeth of the chainring. The teeth are a little bit sharper, a little bit blunt, and a little shorter. This design is to make the chain easier to leave and adapt to the disc when shifting, and the shifting is smoother, and it is not a defective product.