The DURA-ACE Rear Disc Wheel minimizes drag in time trials and triathlons, helping maintain speed over long distances. A full disc construction and highly optimized aerodynamic profile work together to maximize efficiency when every watt matters.

• Full Disc Wheel Design: Full disc construction reduces aerodynamic drag and improves efficiency during sustained high-speed efforts
  
• Aerodynamically Optimized: Refined through extensive aerodynamic development to minimize resistance and support higher average speeds
  
• Time Trial and Triathlon Specific: Purpose-built for racing disciplines where aerodynamic efficiency has the greatest impact on performance
  
• Engineered for Long Efforts: Designed to maintain speed and efficiency over extended distances, helping riders execute pacing strategies effectively
  
• Direct Engagement Freehub: High-stiffness freehub construction delivers efficient power transfer during acceleration and at race pace