The Trek Aero RSL Low Bearing Top Cover is a genuine replacement part designed to provide a more aggressive, aerodynamic position on your road bike. Specifically built for the RCS headset system, it offers a fit that is 4mm lower than the standard cover, allowing you to slam your stem for a cleaner profile.

Integrated Cable Management: This component is optimized for the Aero RSL Barstem, ensuring that all brake hoses and electronic cables remain tucked away for maximum wind-cheating efficiency. It maintains the seamless, integrated aesthetic of your Trek cockpit while providing the structural integrity required for high-performance riding.