ROCKBROS Road Aero Bike Helmet for Adults TT Triathlon Helmet for Cycling STORY SPARK including reducing inflammation

including reducing inflammation

3 inches (50-54cm)

which avoids any problems related to accidental tugging of the charging cable

or airports

ROCKBROS Road Aero Bike Helmet for Adults TT Triathlon Helmet for Cycling STORY SPARK including reducing inflammationSMALLER AIR RESISTANCE: ROCK BROS Newest road bike aero helmet, teardrop shape provides a best aerodynamic efficiency and ensure the air flow more smoothly. In the Wind Tunnel Testing, ROCK BROS aero helmet get a excellent performance. Comparison with ordinary road bike helmet, this aero helmet have more than 40% decrease of air resistance. EXCELLENT HEAT DISSIPATION: Comfortable temperature from excellent heat dissipation. Called "FORCED AIR