SRAM's lightest, stiffest, and most durable chainring. Their one-piece construction ensures that none of your effort goes to waste. A 13-tooth delta on all chainring pairs ensures precise shifting for any setup, as well as a less dramatic change in cadence during front shifts. And the technology packed in makes this SRAM longest-lasting chainring set ever. FEATURES: Crisp and accurate front shifts One-piece construction for faster, smoother, more secure shifting X-Range gearing technology gives you more range and a smoother gear progression, so you’re always in the right gear SPECS: Material: Aluminum Color: Black , Silver Chainline/Hub Compatibility: 130 Hubs , 135/142 Road Disc Hubs < 415 mm Chainstay Direct Mount Type: Direct Mount SRAM Ring Position/Type: Inner , Outer Drivetrain Speeds: 12 Chainring BCD: Direct Mount SRAM