Specialized Propero 4 Helmet

View More Images

AERODYNAMICS: With extensive testing in CFD and in our Win Tunnel, aerodynamics were at the forefront of the Propero 4 development. We took the aerodynamic leading edge from the S-Works Evade 3 and pulled it directly into the Propero 4-which helped it to be four watts, or 15 seconds over 40km, faster than our S-Works Prevail 3.
ATTENTION TO DETAIL: Beyond just aerodynamics and ventilation, the Propero 4 represents meticulous attention to detail. We went the extra mile by incorporating cutting-edge technologies from our S-Works level helmets, like MIPS technology for confidence, and a fit system designed to deliver all-day comfort. The Propero 4 doesn't just meet expectations
VENTILATION: Drawing inspiration from our world-renowned S-Works Prevail 3, our goal was not merely to replicate but to elevate. Ventilation became a focal point in our quest for a well-balanced, aerodynamic, and ventilated helmet. We incorporated the rear-end design language of the S-Works Prevail 3 and introduced small 2mm offset micro-channels that create turbulence in the airflow throughout the helmet to help create a continuous, refreshing flow of air.

Size Guide

Specialized Ambush 2, Chamonix 3, Evade 3, Gambit, Loma, Mode, Prevail 3, Propero 4, Search, Tactic, Tone, TT5 Bike Helmets

Specialized Ambush 2, Chamonix 3, Evade 3, Gambit, Loma, Mode, Prevail 3, Propero 4, Search, Tactic, Tone, TT5 Bike Helmets
Size	S	M	L
Head Circumference	20 - 22"	21 3/4 - 23 1/4"	22 3/4 - 24 1/2"

Specialized Airnet, Echelon II, Propero III Bike Helmets
Size	S	M	L
Head Circumference	20 - 22"	21 3/4 - 23 1/4"	23 1/4 - 24 3/4"

Specialized Align II Bike Helmet
Size	S/M	M/L	XL
Head Circumference	20 1/2 - 22"	22 - 23 1/2"	23 1/4 - 24 1/2"