
Sram 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 (48T/50T). Specification Bolt Circle Diameter (BCD): Direct Mount (DM). Speeds: 12. Compact - Yaw: N/A. Material (Chainring): Aluminium.