Specialized Propero 4

Specialized PROPERO 4

The Propero 4 combines the aerodynamic advantages of the S-Works Evade 3 with the excellent ventilation of the S-Works Prevail 3, without compromising comfort and, of course, most importantly, safety. With the Propero 4, we've designed a high-performance race helmet that excels in all categories, be it aerodynamics, ventilation, or weight. From newcomers to seasoned riders, the Propero 4 is a helmet for all racers, ready to contribute to those crucial seconds.
AERODYNAMICS: Aerodynamics were a top priority during the development of the Propero 4. We conducted extensive computational fluid dynamics studies and tested it in our WinTunnel until we found the perfect design. It's no wonder, then, that the new Propero bears a strong resemblance to the S-Works Evade 3 from the front. It was a lot of effort, but in the end, it paid off: the Propero 4 is a full 15 seconds faster over 40 km than our S-Works Prevail 3. That's 4 watts of power that can now be converted into speed.
VENTILATION: Just as important to us as aerodynamics is the ventilation of the Propero 4. Here, too, we were inspired by our S-Works helmets. However, we didn't want to simply copy the S-Works Prevail 3. We wanted to integrate and improve its ventilation system into the new design. Ultimately, we opted for its rear vents and added a new system to the Propero 4. Micro Channeling consists of small, 2 mm-diameter air channels that swirl the airflow throughout the helmet, ensuring continuous ventilation and a refreshing coolness.
ATTENTION TO DETAIL: Of course, we didn't limit our development to aerodynamics and ventilation alone. We considered every single detail and borrowed as much technology as possible from our S-Works helmets—including MIPS® technology for added confidence and a fit system that provides all-day comfort. The new Propero 4 fully meets our standards for a high-end performance helmet for racing.

• The MIPS Evolve system consists of a low-friction layer that allows for 10 to 15 mm of sliding movement in all directions. Studies indicate that this layer effectively reduces the rotational forces transmitted to the brain during lateral impacts.
• The Propero 4 has received 5 out of 5 stars in the Virginia Tech® Helmet Rating™ from the internationally renowned Virginia Polytechnic Institute and State University.
• The FS3 adjustment system and the ability to adjust to the individual's lower skull base optimize comfort. Additionally, the helmet angle can be adjusted for better compatibility with different goggles.
• The adjustable Tri-Fix strap system ensures a secure hold and straps that are only 10 mm wide increase comfort.
• Special channels in the helmet safely transport your sunglasses when you don't need them.
• Large rear vents like the S-Works Prevail 3 and micro channeling improve ventilation.
• The design language of the S-Works Evade 3 stands for first-class aerodynamic properties.
• All-round shell made of precisely machined polycarbonate for increased durability and high-quality surfaces.