Feature:1. The unique inclination Angle design makes it easy to increase the stepping frequency on the flat road, and easier to plan the dead point on the uphill, which is convenient for cycling.2. Optimized tooth shape design, improved details, more reliable chain and antistripping, more convenient dirt cleaning.3. Eagle tooth design, thickness one thick one thin, higher rotation efficiency, internal chain consistent.4. The tooth disc adopts lightweight design and hard oxidation treatment. The unique tooth shape design can effectively prevent chain drop.5. Support 812 speed system, 5mm thick, effectively increase the chain contact area, increase the use of tooth area.Specification:Item Type:Bike Positive & Negative Tooth DiscNumber of teeth: 32TMaterial: Aluminum AlloysShape: OvalProduct Size: Approx. 14.3x13x0.4cm/5.6x5.1x0.2inWeight: Approx. 83g/2.9ozApplication: 8/9/10/11/12,Common BCD104 Crank-Mounted Small Tooth Disc, Suitable for AM, FR, DH, Heavy Duty Vehicles .Package List:1 xPositive & Negative Tooth Disc