SRAM's lightest, stiffest, and most durable chainring. The one-piece aluminum construction ensures that none of your effort is lost. A 13-tooth difference on all chainring pairs provides precise shifting for any setup, as well as a less dramatic change in cadence during front shifts. And the technology SRAM has applied makes this the longest-lasting chainring set ever. The most durable, lightest, and stiffest chainring SRAM has ever made. X-Range shifting provides more range and you're always on the right chainring. This SRAM RED chainring is super lightweight and guarantees top performance. The one-piece construction ensures that no effort is lost. Thanks to refined technology, durability is greater than ever. Light, stiff, and durable chainring. One-piece construction for faster, smoother, and safer shifting. X-Sync technology ensures excellent chain control. X-Range gearing technology offers more range and smoother shifting. SRAM Article number: Retail packaging: Yes