Our light, stiff, and durable direct mount chainrings let you pick the exact gearing you want and quickly swap sizes. Our X-SYNC technology keeps the chain where you need it to be, too. Features - X-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain control - Laser-etched chainring finish is more durable - X-Range gearing technology gives you more range and a smoother gear progression, so you're always in the right gear - Improved aerodynamics for time trial and triathlon - Available in 48T and 50T