Designed specifically for oval chainrings, keeping your chain secure at every single crank position. Also works with round rings- Includes integrated taco- Features a unique adjustable chainline from 48-53mm making it compatible with standard and Boost setups- Fits 26-34T oval or 28-36T round chainrings- Backplate is 7075 aluminum, cage and bash plate are GF + PA66 polymer composite, bolts are titanium T25