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    Bell 4Forty Air MIPS Bike Helmet

    Ratings Scorecard

    Test Results

    Impact absorption

    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.

     /  5
    Ventilation

    Ventilation

    The evaluation of how well air flowing through the helmet provides cooling during rides. Based on actual usage and expert judgement.

     /  5
    Fit adjustments

    Fit adjustments

    The evaluation of the features and versatility of the retention system when adjusting the fit of the helmet. Based on expert judgment.

     /  5
    Ease of use

    Ease of use

    The evaluation of how easy the buckles and adjustments are to use. Based on expert judgment.

     /  5

    About

    The Bell 4Forty Air MIPS is part of the Bike Helmets test program at Consumer Reports. In our lab tests, Bike Helmets models like the 4Forty Air MIPS 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.

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