Collection: BTA Mount

When every watt counts and aerodynamics meets functionality, BTA Mounts (Between-The-Arms Mounts) become a central element of your tri-bike setup. These mounts are designed to strategically place your water bottle between your aero bar extensions, saving you watts and providing easy access to fluids – without having to change your riding position.

Instead of mounting the bottle in a classic frame position or behind the saddle, a BTA solution allows you to keep your hands in an aero position while drinking. This is especially beneficial in long triathlon distances and time trials, where continuous fluid intake and aerodynamic optimization are crucial for performance.

At Transition Zone, we have selected the most thoroughly tested and popular BTA Mounts from Xlab, Aerogain and Profile Design, so you can find the solution that best suits your bike and your needs.

One of the primary benefits of BTA Mounts is that they are designed with aerodynamics in mind. By placing the hydration system in the space that already exists between your arms in an aero position, you reduce overall drag compared to traditional bottle positions. This means you can maintain your desired speed with fewer watts – an essential benefit over long distances.

In addition, the position makes it extremely easy and quick to drink on the go. You don't have to change your body position or let go of the handlebars, which gives both more stability and less time loss. For triathletes and time trial riders who want to stay in an optimal position the whole way, this is a big advantage.

BTA Mounts from Xlab, Profile Design and Aerogain are all designed to be lightweight, adjustable and compatible with a variety of bottle types and aerobar layouts. Some models include integrated bottles with straws, while others are designed for standard bottles and can be upgraded with insulated covers and computer mounts.

The perfect BTA system depends on several factors: your bike's cockpit design, the length of your tri-bar extensions, your fluid volume needs – and last but not least, your personal preference. Fortunately, there's a solution for almost any setup.

Xlab is known for their extensive range of aerodynamic hydration mounts and integrated bottles. They offer both minimalist mounts and complete systems with integrated straw, splash guard and computer mount.

Aerogain focuses on high-quality, lightweight solutions with a clean look. Their BTA mounts are especially popular with riders who want precise adjustment and low weight.

Profile Design has been among the pioneers in triathlon equipment for many years, offering robust and functional mounts that are easy to install and adjust - even under race conditions.

At Transition Zone we are happy to guide you in choosing the BTA Mount that best suits your bike and your needs. Whether you want a complete system with bottle and straw, or just a lightweight mount for a standard bottle, we have the solution.

At Transition Zone, we recommend BTA Mounts for all triathletes, regardless of level. Even small adjustments to your hydration strategy can have a big impact on your comfort, energy levels, and race pace. When you choose a system that makes it easier to get fluids without losing speed or disrupting your aero position, you'll have an advantage that lasts all the way to the finish line.

We carry a careful selection from Xlab, Aerogain and Profile Design – all brands with proven quality and high user satisfaction among triathletes worldwide. The combination of low weight, aerodynamic design and practicality makes these mounts some of the most functional equipment you can add to your bike.

Are you unsure which solution is right for you? Stop by Transition Zone or contact us for advice. We will help you find the right setup – whether you are running Ironman, 70.3 or shorter distances.