1,Bicycle chainring is made of solid chrome molybdenum steel structure. The material is wear‑resistant, deformation‑resistant and of high strength. Appropriate thickness ensures that they will not bend. 2,Ergonomic round shape effectively utilizes punching to generate more yarn traction, reduces the load and fatigue of the legs or knees, and ensures a smooth ride. 3,Unique toothed design increases the contact area of the chain, improves the grip and reduces the sagging of the chain, allowing you to easily navigate the bumpy road. 4,The design of narrow and wide teeth ensures the chain is fixed, effectively protects the frame from scratches, prolongs wear life, and reduces friction and noise, surface is easy to clean. 5,When change the speed, the chain is easier to leave and adapt to the plate, and the gears are smoother, not defective. Large and middle size have such uneven tooth design. Item Type: Bicycle Chainring Material: Chrome Molybdenum Steel Application: Universal for Four-jaw Variable Speed Chainring 1 x Bicycle Chainring Note: 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. Sold by-Minnanxin