This fits your . Make sure this fits by entering your model number. 【Optimized Tooth Shape Design】Optimized tooth shape design, improved details, more reliable chain and anti‑stripping, more convenient dirt cleaning.Eagle tooth design, thickness one thick one thin, higher rotation efficiency, internal chain consistent. 【Unique Inclination Angle Design】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. 【Lightweight And Durable】The tooth disc adopts lightweight design and hard oxidation treatment. The unique tooth shape design can effectively prevent chain drop. 【Suit For】Product Size: Approx. 14.3x13x0.4cm/5.6x5.1x0.2in,Weight: Approx. 83g/2.9oz.Application: 8/9/10/11/12,Common BCD104 Crank-Mounted Small Tooth Disc, Suitable for AM, FR, DH, Heavy Duty Vehicles. 【Increase Chain Contact Area】Support 8‑12 speed system, 5mm thick, effectively increase the chain contact area, increase the use of tooth area.