The impact response of traditional and BMX-style bicycle helmets at different impact severities

Bicycle helmets reduce the frequency and severity of severe to fatal head and brain injuries in bicycle crashes. The authors' goal here was to measure the impact attenuation performance of common bicycle helmets over a range of impact speeds. They performed 127 drop tests using 13 different bicycle helmet models (6 traditional style helmets and 7 BMX-style helmets) at impact speeds ranging from 1 to 10 m/s onto a flat anvil. Helmets were struck on their left front and/or right front areas, a common impact location that was at or just below the test line of most bicycle helmet standards. All but one of the 10 certified helmet models remained below the 300 g level at an impact speed of 6 m/s, whereas none of the 3 uncertified helmets met this criterion. The authors found that the helmets with expanded polystyrene liners performed similarly and universally well. The single certified helmet with a polyurethane liner performed below the level expected by the Consumer Product Safety Commission (CPSC) standard at their impact location and the helmet structure failed during one of two supplemental tests of this helmet above the test line. Overall, they found that increased liner thickness generally reduced peak headform acceleration, particularly at higher impact speeds.


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  • Accession Number: 01599445
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 2 2016 1:51PM