Extensions: What should you pay attention to?
If you've watched a triathlon or a cycling time trial, you've probably noticed that the riders are lying low and streamlined over the handlebars with their arms tightly together in front of them. What they use are extensions to make the position more aerodynamic.
Extensions typically consist of arm cups and extensions, which make it possible to rest the upper body while significantly reducing air resistance.
For the triathlete, it's not just about speed - it's just as much about conserving energy for the next run. A good aerodynamic position can be the difference between stable energy expenditure and a precious burnout.
Here is a quick guide you can use to choose the right setup for you.
High end : Delta Speed Extension
Aerodynamics : xxxxx
Comfort : xxxxx
Price : $$$
These extensions are high-end extensions designed for triathlon and time trial bikes, where aerodynamics and control must be at their absolute best. In addition, the ergonomic design helps you maintain a comfortable position - especially over long distances.
Every body is different, so they come with an adjustable fit so you can adjust the position to suit your riding style. They are available in standard sizes and small for riders with less reach.
What kind of rider is it for?
Ambitious triathletes and time trialists; If you're into competition and marginal improvements, this is a setup that can elevate your performance. Perfect for those who already have an aero position and want to improve comfort over longer distances without compromising speed.
This type of extension is not just "an extension" - it's an aero tool, developed with professional bike-fit expertise, to better connect you to your bike and significantly reduce drag, while allowing you to hold the position for longer.
Similar:
Medium: AeroCoach Angled Carbon Extensions
Aerodynamics : xxx xx
Comfort : xxxx x
Price : $$$$
These carbon extensions help you fine-tune your position and comfort on your triathlon or time trial bike. You can choose between different angles (25°, 35° or 45°) to customize your aero position. All variants allow you to play with position so you can find the perfect balance between aggressive aerodynamics and comfort.
The grips are designed to keep your hands and arms stable. They are compatible with standard 22.2 mm extension clamps and can be used with both mechanical and electronic gear systems.
What kind of rider is it for?
They are perfect for those who already have some experience with the aero position and want to improve both aerodynamics and comfort. You will get more control over your position and an aerodynamic advantage compared to very basic extensions.
Similar:
Entry level: Profile Design Sonic Ergo
Aerodynamics : xx xxx
Comfort : xx xxx
Price : $ $$
The Profile Design Sonic Ergo is a classic clip-on extension that gives you access to the aero position without having to change your entire cockpit. It mounts directly onto a standard racing handlebar and is a popular choice among new triathletes. It is easy to install and provides stable support. There are many adjustment options - you can move them back and forth depending on your desired position.
What kind of rider is it for?
These extensions are perfect for beginners in triathlon. They work especially well for sprint and Olympic distances – or as a first step.
You get a noticeable aerodynamic advantage without it being technical or complicated. It's not the lightest or most aerodynamic solution on the market – but it's easy, functional and does exactly what it's supposed to.
Similar:
Small adjustments can make a big difference. Use the guide as a starting point and don't be afraid to experiment until your extension setup feels natural and stable.
