![]() ![]() The score values in these ratings are not comparable to score values in our helmet ratings for other sports. The overall score estimates the number of concussions the average person would see if they experienced identical impacts at rates matching their weightings while cycling.Ī lower score indicates better helmet performance. Each risk is multiplied by its weighting factor and then summed together to compute an overall score. We compute concussion risk from measured peak linear acceleration and rotational velocity for each test. ![]() Velocities were selected to reflect common cyclist head impact velocities based on helmet damage replication studies.Įach lab impact is weighted based on how often a cyclist might experience a similar impact. We test 6 locations that are dispersed around the helmet at medium and and high impact energies. We measure linear acceleration and rotational velocity for each impact, which are correlated to concussion risk. A drop tower designed to match helmet-to-ground characteristics in cycling is used to test the helmets. We rate each bike helmet based on the results of 24 impact tests in our laboratory. Our ratings are an independent and objective assessment of helmet performance for consumers, free from manufacturer influence. ![]()
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