RaceFace ERA Direct Mount Chainring - 34t, DM CINCH, 10-12 Speed, Narrow-Wide, BlackThe RaceFace ERA Direct Mount CINCH Chainring is designed for compatibility with modern 10, 11, and 12 Speed chains. RaceFace bonded a carbon fiber spider with stainless steel teeth and a premium 7075 aluminum CINCH interface to offer a chainring that is expected to last 5 times longer than a typical alloy chainring. ERA is a chainring without compromise. Carbon fiber spider, compressed and co molded using the same process we developed for ERA carbon