UnderCup BTA System
The UnderCup BTA (Between-The-Arms) Mount is a sleek, stable solution for positioning your hydration bottle underneath your arm cups, ideal for setups without a dedicated BTA mount. It’s designed to enhance both aerodynamics and accessibility, all while maintaining a clean, compact profile. Perfect for high-performance training or racing, the UnderCup BTA is built to stay secure and steady, even on rough roads or during aggressive efforts.
Key Features
🔧 Universal Fit – Designed to mount under most arm cups.
💨 Aero-Focused Design – Tucks the bottle beneath the arms to reduce frontal drag and streamline your position.
🛠️ Customisable Options – If your cockpit setup is unique, we can customise the system to suit your needs. Includes adjustable stack height, multiple bottle positions, and an optional light mount for added flexibility.
📌 Not seeing an option that fits your setup?
No problem! Simply click here to go to the Custom Design page and fill out the form. We’ll help build a system tailored specifically to your bike.
👇 See below for how to select your UnderCup BTA system.
Not seeing an option that fits your specific setup?
No problem! We understand that every cyclist's cockpit and setup can be unique, requiring a customised solution for optimal performance. Simply click here to head to the Custom Design page and fill out the form with your specific details.
On the Custom Design page, you’ll be able to:
Provide precise measurements and details about your bike’s cockpit.
Share any unique requirements or preferences for your BTA system.
Ensure a tailored design that perfectly integrates with your setup.
Once we receive your information, our team will review your submission and collaborate with you to create a bespoke BTA mounting solution that’s customised to your exact needs. Whether it’s a unique angle, mounting position, or height requirement, we’ll craft the perfect system for your ride.
How to Select Your UnderCup BTA System:
Choose Your Base:
Select the base that matches your bike setup to ensure compatibility with your arm cups and handlebars.Choose Your Bar Pitch Range:
Determine the angle range of your bars (e.g., 11-20 degrees) to ensure proper alignment.Important: When you add this product to your cart, you will be prompted to provide your exact bar pitch measurement for precise customisation.
Measure the angle of your bar using the arm cup surface as a reference. Ensure both wheels are on the ground when taking this measurement. If you’re using an iPhone, refer to this guide for help:
Measure Angles with iPhone
Choose Your Stack Height:
Default (Medium): Suitable for most riders, offering a balanced fit for typical arm and torso proportions.
Taller Stack: Recommended for taller riders who require more elevation.
Shorter Stack: Ideal for shorter riders to maintain optimal positioning and comfort.
System Details:
Dual Bottle Capable:
Hardware for mounting two bottle cages is included, but the bottle cages themselves are not.Stack Height:
Adjustable in 10mm increments. The system includes 3 x 10mm spacers, providing up to 30mm of adjustment. Additional spacers can be purchased if you find the system height is too short for your setup.Mounting:
The plate mounts securely underneath the arm cups or arm cup wedges, ensuring a stable and aerodynamic fit.Materials:
All necessary hardware is included and made from stainless steel for durability and corrosion resistance.
Additional Notes:
For the Sync Ergonomics Bar 1, the system mounts underneath the arm cup wedges, and the bar angle will be set to 0 degrees.
The modular design ensures compatibility with various setups while maintaining a secure and stable fit.
