The Bell Block is part of the Bike Helmets test program at Consumer Reports. In our lab tests, Bike Helmets models like the Block are rated on multiple criteria, such as those listed below.
Impact absorption: The ability of a helmet to absorb impact forces in a crash, which reduces the rate of deceleration experienced by the head. Based on laboratory impact testing.
Ventilation: The evaluation of how well air flowing through the helmet provides cooling during rides. Based on actual usage and expert judgement.
Fit adjustments: The evaluation of the features and versatility of the retention system when adjusting the fit of the helmet. Based on expert judgment.