Collection: Extensions

When seconds count and every watt counts, extensions are a crucial part of your triathlon or time trial bike’s cockpit setup. Extensions – also known as aero bars – allow you to get into a more aerodynamic and efficient position, allowing you to cut through the wind with minimal energy consumption. Whether you’re racing Ironman, shorter tri-distances or time trials, they’re an essential upgrade that can improve both comfort and performance.

At Transition Zone you will find a carefully selected range of extensions from Profile Design, Zipp and Drag2Zero – three of the market's most renowned manufacturers, each of which delivers top-class solutions. With the right setup you can adjust your position, optimize your aerodynamics and ensure stability, even at high speeds.

Extensions come in many different shapes and materials, and the choice depends largely on your preferences, riding style, and physical condition. The most common types are J-shaped, S-shaped, and straight extensions, each of which provides different hand positions and angles for the forearms and hands.

Profile Design offers a wide range of models to suit all levels. Their extensions are known for their high functionality, easy adjustment and great comfort. They are made of both aluminum and carbon fiber and come in different lengths and curves.

Zipp is known for their lightweight carbon fiber solutions and uncompromising aerodynamics. Zipp extensions are developed with data from professional riders and wind tunnel tests, ensuring optimal performance for both recreational and elite riders.

Drag2Zero are specialists in aerodynamic optimization and offer high-end extensions with a focus on precise positioning and performance. Their products are popular with serious triathletes and time trial riders who are interested in marginal gains.

Whether you're into aggressive race position or more comfort-oriented riding, we can help you find the right combination of length, angle and material choice.

One of the biggest advantages of modern extensions is that they allow for fine-tuning your position to maximize both aerodynamics and comfort. With proper adjustment, you can reduce the strain on your shoulders and neck while improving handlebar stability – something that is especially important over longer distances.

Profile Design, Zipp, and Drag2Zero all offer extensions that are compatible with a wide range of clamps and arm cups, so you can easily customize your setup to suit your body and riding style. Additionally, modularity makes it possible to change or upgrade parts of your cockpit without having to replace the entire system.

Many extensions are also compatible with electronic shifters and can be integrated with Di2 or eTap Blips for optimal functionality, allowing you to shift gears without moving your hands from an aero position – a huge advantage during competition.

At Transition Zone, we are happy to help you find the optimal setup, whether you are new to the sport or looking for marginal gains in your next Ironman.

Extensions are much more than just a piece of metal or carbon fiber. They are a central part of your contact surface with the bike and an important component of your aerodynamic strategy. A good extension solution allows you to lie stable, comfortable and fast – and that makes a noticeable difference when the miles get long and the intensity increases.

At Transition Zone, we have selected the most popular extensions from Profile Design, Zipp and Drag2Zero, so you can find exactly the solution that suits your cockpit and your goals. We carry both complete setups and individual extensions, so you can customize as needed – and we are always ready to advise you on setup, fit and compatibility.

Want to take your position and speed to the next level? Then it might be time to upgrade your extensions. Stop by the store or explore the selection online – and get ready to lie low, fast and comfortable in your next competition.