This is the SRAM XX1 11 Speed Chainring. The SRAM XX1 was built with a dedicated 1X design philosophy
- making it simpler, lighter & more durable than any other. No matter where you ride, no matter what you're up against: SRAM XX1. Unstoppable. Developed for the maximum chain control, each tooth's thickness is precisely CNC-machines to support the chains inner & outer links perfectly. Six available chain rings (28-38) allow you to tune your gear range to match your terrain, wheel size & riding style. Each X-Sync chain ring fits a single universal spider
- allowing you to change ring without removing the light-weight carbon crank arm. A CNC-machined 'wide tooth, narrow tooth' pattern is repeated around the entire chainring, perfectly mirroring the chain's inner & outer links for maximum control.