Product

Carbon fiber body

Carbon fiber allows for optimized stiffness, reduced torsion and precise shaping that aluminum simply cannot match. With better load distribution and aerodynamic shaping, Masamune delivers increased power transfer and more predictable handling under fatigue — crucial in Ironman bike legs.

The monocoque design allows smoother aerodynamic shaping and eliminates weight-adding joints, resulting in a lighter and stronger structure. For Ironman athletes, every gram and every watt of stiffness counts. A more rigid cockpit enhances power transfer, keeping the bike stable when fatigue sets in at the later stages of the ride.

Carbon also reduces road buzz and micro-vibrations, promoting a calmer and more controlled riding experience. Over 180 km, this translates into less arm fatigue, better decision-making and more consistent pacing. Masamune’s carbon engineering creates a cockpit built not just for speed, but for durability and performance across the toughest races.

Soft, cushioned foam

Arm pad comfort is one of the most underestimated factors in long-course racing. Masamune’s high-density cushioned foams are designed to absorb micro-vibrations and minimize pressure buildup across the forearms. The hex-pattern improves airflow and grip, preventing slipping even during intense sweating or rough road segments.

Comfort isn’t only about softness — it’s about stability. By keeping the arms securely centered, the foams help riders maintain a consistent aero position and reduce unnecessary upper-body movement. This stability is crucial over long distances, where small posture deviations can cost time, energy and efficiency. The material is lightweight, durable and optimized to maintain support even after hours in the saddle.

Adapt to your riding style

Hand position plays a critical role in both aerodynamics and fatigue management during long-course racing. Masamune’s interchangeable grips allow athletes to switch between Mono and Dual grip configurations depending on shoulder width, wrist comfort and preferred steering feel.

The Mono Grip offers a clean, compact profile ideal for aggressive aero positions and minimal frontal area. The Dual Grip provides increased leverage and stability, especially useful for technical courses, variable wind conditions or athletes who prefer additional control during long efforts.

Both grip options integrate seamlessly into the Masamune system, maintaining structural rigidity and aerodynamic efficiency while allowing real personalization. This modular approach ensures that as your position evolves, your cockpit can evolve with it.

Accessories for your rides

Every triathlete’s needs are different, which is why Masamune offers a full ecosystem of accessories designed to complement and upgrade your cockpit. From double grips to GPS mounts and aerodynamic bottle holders, each component integrates seamlessly into the cockpit without compromising aerodynamics or handling.

These accessories allow athletes to personalize hydration, navigation and control based on race strategy and comfort preferences. The modular design ensures compatibility, stability and clean cable routing. With Masamune, you create a setup that adapts to your racing style — not the other way around.