Syn Ergonomics AB02 UnderCup BTA System

from $220.00

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

  • 💨 Aero-Focused Design – Tucks the bottle beneath the arms to reduce frontal drag and streamline your position.

  • 🛠️ Customisable Options – 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.

Overall Bar Width:
Bar Angle:
Stack Height:
Light Mount:

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

  • 💨 Aero-Focused Design – Tucks the bottle beneath the arms to reduce frontal drag and streamline your position.

  • 🛠️ Customisable Options – 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.

Overall Bar Width
The distance from the outside edge of the left aerobar to the outside edge of the right aerobar, measured at the point where the arm cups are positioned.