SRAM X-Sync wide-tooth, narrow-tooth chainring technology provides maximum chain control X-Range gearing technology gives you more range and a smoother gear progression, so you�re always in the right gear Laser-etched chainring finish is more durable Improved aerodynamics for time trial and triathlon 8 bolt direct mount for new Red and Force AXS cranksets Direct Mount 48T Grey 12sp Narrow/Wide ...