Specialized Propero 4 Bike Helmet bikepublish R01 30mm Adjustment Plate:

R01 30mm Adjustment Plate:

Polartec Alfa synthetic insulation

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 specially designed e-bike is comfortable to ride in town or on dirt roads

Specialized Propero 4 Bike Helmet bikepublish R01 30mm Adjustment Plate:Meet 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