ABUS Airbreaker Bike helmet (51-55 cm - S, black/grey) - The Airbreaker by ABUS is a particularly aerodynamic cycling helmet that is ideal for both your daily training on your racing bike and your next race. Plus, the lightweight construction offers a high level of safety on your bike. A so-called Acticage Lite is integrated into the EPS inner shell to optimise this helmet's stability. Its Multi Speed Design gives the road bike helmet a honeycomb structure that regulates the ventilation as needed. The eleven air inlets are connected to the thirteen air outlets via flow channels and allow extra air to circulate around your head during strenuous passages. Thanks to the easy-grip adjustment wheel, the Zoom Ace adjustment system at the back of the head can be comfortably adapted even while cycling.The aerodynamic glasses holder and FlowStraps in the chin area make the Airbreaker cycling helmet by ABUS the first choice for all road cyclists.