RaceFace Evolve Chainring Set
Evolve outer and middle chainrings are built from 7075-T6 aluminum for increased wear resistance & impact strength. Evolve granny ring is made from high strength, heat-treated CrMo steel with a satin chrome plated finish for maximum durability. Engineered with a focus on optimizing the chain to ring interface, Evolve rings shift flawlessly, even under load.
Used these on a 3x9 set up. The shift smooth, and look great too. I have had 3 rides with them so far, and the large ring seems to be holding up to rocks and logs.