Profile Design 52a Aero Bar Extensions 400 mm

Profile Design 52a Aero Bar Extensions are specifically developed to give cyclists and triathletes a significant advantage when it comes to cutting through the wind. The most prominent feature of this model is the 52-degree bend, which allows the rider to choose between two primary hand positions to optimize performance. You can either hold high to achieve a so-called shrugged position, which minimizes the frontal area and thus air resistance, or you can hold lower for a more open position that improves visibility and breathing without sacrificing too much speed. This flexibility is crucial during long races like an Ironman, where fatigue can make it necessary to change positions along the way to avoid soreness. Additionally, the rise of the extensions is designed with Kamm shaping, an advanced aerodynamic profiling known from high-end frame design, which effectively reduces turbulence around the handlebars. By optimizing your position with these extensions, you can achieve a better balance between comfort and efficiency, which ultimately means you can maintain a higher speed with the same power output. It is not just about being fast on short stretches, but about being fast over time, and here the ergonomic design plays a major role in preventing tension in the shoulders and neck, which is often the biggest limiting factor for time trial specialists and triathletes at all levels.

Looking at the technical details, the Profile Design 52a is constructed from high-quality 6061-T6 aluminum, ensuring an optimal combination of low weight and extreme durability. Aluminum is a preferred material for many riders, as it is highly resistant to the mechanical stresses that occur during both intensive training and transport to competitions. The extensions have a total length of 400 mm, providing ample space to adjust them precisely to your arm length and preferred riding position on the bike. A unique and highly appreciated detail is the lateral displacement, also known as offset, of 7.5 mm per side, providing a total width adjustment of 15 mm. This allows the rider to fine-tune the distance between the hands without having to angle the bars themselves too much, ensuring a more natural and relaxed grip on the handlebar. The rise of the extensions is 87 mm, providing the necessary height to achieve an aggressive yet still sustainable position in the cockpit. With a standard outer diameter of 22.2 mm, they fit in most common clamps and brackets. The construction is also pre-drilled for internal cable routing, which is fully compatible with both traditional mechanical groupsets and modern electronic systems like Shimano Di2 or SRAM eTap. This results in an incredibly clean and streamlined cockpit setup, where the cables are routed hidden out of the back of the extensions, further contributing to aerodynamic gains and giving your bike a thoroughly professional appearance.

Profile Design 52a is designed with maximum versatility in mind, making them compatible with the vast majority of modern aerobar systems found on the market today. Thanks to the standardized 22.2 mm diameter, these extensions can be easily integrated into your existing setup, whether you ride a dedicated time trial bike or have mounted clip-on bars on your standard road bike to try your hand at triathlon. This makes them the obvious choice for both beginners looking to upgrade their current position and professional time trial specialists chasing the smallest marginal gains. Profile Design is a brand with a very long and proud history in transition zones all over the world, and their reputation for high quality and extreme adjustability is fully deserved. By choosing the 52a model, you are investing in a product that can be adapted to your ongoing development as a rider. If you change bikes or adjust your posture through targeted flexibility training, the modular design allows you to make the necessary adjustments quickly and easily without having to buy new equipment. The ergonomic end caps provide extra comfort for the thumbs and hands, reducing vibrations from the road and providing a more secure grip at high speeds or in technically difficult turns. Whether your personal goal is a new record on a 40 km time trial or completing the final marathon after 180 km of cycling in a stable and energy-saving position, these extensions deliver the necessary technical support and superiority that Profile Design is world-renowned for.