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    Welcome to Consumer Reports.

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    Bike Helmets

    Bell 4Forty bike helmet

    This bicycle helmet is rated a “Don’t Buy: Safety Risk” after the chinstrap buckle broke in our routine testing. A buckle failure like this can allow the helmet to get pushed out of position during an accident so that it no longer offers any protection.

    About

    The Bell 4Forty is part of the Bike Helmet test program at Consumer Reports. In our lab tests, Bike Helmet models like the 4Forty are rated on multiple criteria, such as those listed below.

    Features

    Magnetic buckle Magnetic buckle Indicates whether the chin strap buckle is magnetic.
    no
    Visor type Visor type Indicates whether or not there is a visor and if it is permanently attached or removable.
    detachable
    Adjustable retention strap Adjustable retention strap Indicates whether the retention strap can be shortened, lengthened and re-positioned to help customize the helmet's fit. The retention strap is made up of the chin strap and under-ear loops that help secure the helmet to the head.
    no
    Locking side-slides Locking side-slides Indicates whether the tabs that secure the under-ear loops of the retention strap, can lock to secure the adjustment.
    no

    Specs

    Style Style Identifies the look of the helmet. Bike - a traditional road bike or mountain bike look with plenty of ventilation. Multi-use - a skateboard look with full coverage and minimal ventilation. Commuter - a full coverage urban look for every day commuting.
    bike
    Sizes available Sizes available A listing of the available sizes for the model.
    S, M, L, XL
    Dimensions Dimensions The head circumferences available, which correspond to the helmet sizes.
    52-56, 55-59, 58-62, 61-65
    Weight (g) Weight An average weight of multiple samples. Size medium is weighed for helmets with multiple sizes. If medium is not manufactured, a large and small sized helmet is used to determine the weight.
    353