Red E1 Aero 1x ChainringOur 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. 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 youre always in the right gear Improved aerodynamics