The new FLT 12 SPD chainring has an updated tooth profile optimized for SRAM Flattop 12 SPD chains. Easton direct mount rings use a new narrow/wide design specifically tailored to road/cx/gravel applications. The individual tooth profile has moved from the traditional symmetrical shape to more directional specific design with the intention to create a positive chain roller engagement to help with chain retention, critical to prevent chain slip and bounce over rough terrain.Features:- EA90 SL Alloy- Optimized for 12 Speed Flattop Chains- Cinch System Compatible- Variable Tooth Width- Optimized Retention via Directional Tooth DesignSpecifications:- Single Direct Mount: 36t, 38t, 40t, 42t, 44t- Weight Complete: 442g 172.5mm 40t W/O Bb- Chainline: 47mm- Material: Ea90 Aluminum