TREK RSL AERO BOTTLE AND CAGE ERA BLACK / GREY

The Aerodynamic Edge for High-Speed Pursuits.

The Trek RSL Aero Bottle and Cage system is a wind-tunnel-proven hydration solution designed to make your bike faster. Unlike standard round bottles that create significant drag, the RSL Aero (Race Shop Limited) system is engineered as a singular, cohesive unit. When mounted to the frame, the bottle and cage fill the "void" in the front triangle, smoothing airflow around the down tube and seat tube. This integration can save measurable watts, making it an essential upgrade for time-trialists, triathletes, and performance-focused road riders.

The Era Black / Grey colorway provides a sophisticated, professional aesthetic that blends perfectly with Trek's high-end carbon frames. The system features a secure-grip carbon-reinforced cage that holds the specialized aerodynamic bottle firmly over rough terrain, while the bottle itself features a high-flow nozzle and a BPA-free, easy-squeeze construction. This is more than just a place to store water; it is a structural component of your bike’s aerodynamic profile.

Key Performance Features

• Integrated Aero Design: Specifically shaped to integrate with the frame's tubing, reducing turbulent airflow and saving approximately 1.8 watts at 45 km/h compared to standard round bottles.

• Carbon-Reinforced Cage: The lightweight cage is constructed from a high-strength carbon composite, providing a secure "snap-fit" that prevents bottle ejection on bumpy roads.

• High-Flow Actuated Valve: The bottle features a premium, self-sealing nozzle that delivers a high volume of fluid with minimal effort, allowing you to stay hydrated without breaking your aero tuck.

• UCI Legal Dimensions: Engineered to comply with UCI regulations for water bottle dimensions, making it legal for use in all levels of sanctioned road and time-trial racing.

• Tactile Grip Surfaces: The bottle is designed with textured zones to ensure a secure grip, even when your hands are sweaty or you are wearing full-finger gloves.

• BPA-Free Construction: Manufactured from taste-free, BPA-free materials to ensure your water stays fresh and clean during long efforts in the sun.

Technical Specifications

✅ Why This IS For You

• The Marginal Gains Seeker: If you have already optimized your wheels and kit, this is the most cost-effective way to reduce your bike's drag coefficient.

• Trek Madone & Émonda Owners: Specifically designed to complement the tube shapes of Trek's performance road line, providing a factory-integrated look.

• Competitive Racers: Ideal for breakaways or solo efforts where every watt saved translates directly into speed and endurance.

❌ Why This May NOT be for you

• Standard Bottle Users: This is a proprietary system. The cage will not hold standard round bottles, and the aero bottle will not fit securely in traditional cages.

• Long-Distance Touring: At 591ml, the capacity is slightly lower than some oversized round bottles. If you prioritize maximum fluid volume over aerodynamics, a standard setup might be preferable.

BFC Pro Tip

To get the most aerodynamic benefit, we recommend mounting the RSL Aero system on the down tube first, as this is where the airflow transition is most critical. When cleaning, the aero bottle is top-rack dishwasher safe, but we recommend hand-washing the cage with a soft cloth to maintain the Era Black / Grey finish. For the ultimate setup, pair this with a second aero bottle on the seat tube to create a continuous aerodynamic surface across the center of your frame!