Cannondale 's Direct Mount oval chainrings are designed with an offset that works best with Cannondale Ai-drivetrain (FSI). When used on non Ai / FSI Frames, Cannondale 's direct mount oval has 3mm less offset than original, non-Ai Cannondale chainring/spider. So in order to achieve perfect chainline, you will need in this case, to change the spacers on the BB axle and move right side crank closer to the frame. This is an easy task and sets the crank in very good position in relation to the frame. Key Features: - Finest design to provide excellent weight to strength ratio- One of a kind special oval shape (Patent Pending)- Greatly improves traction and climbing abilities- Unique Patent Pending narrow-wide teeth profiles to keep your chain in place for minimum 12 months!- Special 3D teeth machining for ultimate mud relief decrease wear and noise dramatically- They save weight because they dont need the spider and chainring bolts.- The ability of installation of a smaller ring sizes that cant be mounted on regular spider.- Superb quality and great look.- You will ride faster using ovals. If you keep using round ring then others will get quicker.- You will not feel the oval shape at all- Reduces stress on knees- We mastered our oval chainrings to perfection, so you can get best possible advantage from the oval/elliptical shape. NB: Image for display purposes only, Chainring has 28 teeth

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