Every detail of the Propero 4 was designed with the equation of Aerodynamics + Ventilation + Lightness = Speed in mind. In developing the Propero 4, aerodynamics was the starting point, and to that end Specialized performed numerous CFD and wind tunnel tests. With the profile inspired by the S-Works Evade 3 it already gains 4 watts, or 15 seconds over a 40km distance. Taking a cue from the S-Works Prevail 3 helmet, Specialized achieved its goals in terms of quality by incorporating the rear vents of the S-Works Prevail 3, and introducing 2 mm micro-channels that create turbulence in the airflow through the helmet, so as to create a continuous and refreshing passage of air. In addition to aerodynamics and ventilation, the Propero 4 comes with meticulous attention to detail, applying cutting-edge technologies such as MIPS and a sealing system designed for comfort. The Propero 4 goes beyond expectations.

Mips C-Solution Technology.
On the Virginia Tech® Helmet Rating™ scale of the Virginia Polytechnic Institute and State University, the Propero 4 earned 5 stars, the best rating..
FS3 sealing system and occipital base adjustment allow fine tuning to individual head shape.
Helmet position angle can be modified for goggle compatibility.
TriFix strap system for optimal comfort.
Possibility of goggle insertion.
Thin straps, 10mm wide.
Large rear vents and internal micro-channels for maximum ventilation.
Front profile inspired by the S-Works Evade 3.
Very durable polycarbonate shell, and with premium finish.
EN1078 certification.

Specialized PROPERO 4 HLMT CE WHT -L