Specialized Propero 4 Bike Helmet bikepublish and improve efficiency in varied

and improve efficiency in varied backcountry terrain

Kastle's Hollowtech Evo Luminous tip glows in the dark for increased visibility during pre-dawn or late-night training missions

light weight and broad contact area that promotes powerful downhill performance

the ultimate fusion of warmth and versatility for mountain enthusiasts

Specialized Propero 4 Bike Helmet bikepublish and improve efficiency in variedMeet the all new Propero 4 helmet. This helmet combines the aero advantages of the S Works Evade 3 with the ventilation of the S Works Prevail 3, all with the comfort and confidence Specialized helmets are famous for. It earned the highest 5 Star Virginia Tech helmet rating. Every detail of the Propero 4 was created with our equation for speed in mind: Aerodynamics + Ventilation + Lightweight = Fast. AERODYNAMICS: With extensive testing in CFD and in