Specialized Propero 4 Road Bike Helmet

The Specialized Propero 4 is the ultimate road cycling helmet — engineered to deliver the aerodynamic edge of the S-Works Evade 3 and the ventilation of the S-Works Prevail 3, all wrapped in the all-day comfort Specialized is known for. Rated 5-Stars by Virginia Tech®, it's one of the safest road helmets on the market.

Aerodynamics

Developed with extensive CFD analysis and Win Tunnel testing, the Propero 4 borrows the aerodynamic leading edge from the S-Works Evade 3 — making it 4 watts (15 seconds over 40km) faster than the S-Works Prevail 3.

Ventilation

Inspired by the S-Works Prevail 3, the Propero 4 features a rear-end design with 2mm offset micro-channels that create turbulence in airflow, delivering a continuous, refreshing flow of air even at race pace.

Premium Features

• MIPS Evolve Solution — low-friction layer allowing 10–15mm of sliding motion in all directions to help reduce rotational forces during angled impacts.
• 5-Star Virginia Tech® Helmet Rating — the highest safety rating from Virginia Polytechnic Institute and State University.
• FS3 Fit System & Occipital Base Adjustment — personalizes fit to your head shape; adjustable for glasses compatibility.
• Adjustable Tri-Fix web splitter with thin 10mm webbing for increased comfort.
• Dedicated sunglass storage — secure fit, out of the way when you need it.
• Micro Channeling & large rear vents for maximum airflow.
• Full-wrap polycarbonate shell for durability and a premium finish.

For helmets sold in the U.S. and Canada: Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older.