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Bell 4Forty Air MIPS Trail Helmet improves ventilation, adds premium features

bell 4forty air mips mtb helmet matte light gray nimbus color side profile
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The Bell 4Forty Air MIPS overhauls the original, reasonably-priced 4Forty Trail Helmet with a new shell, MIPS liner and some premium features usually reserved for more expensive helmets. True to its name, the new shell opens up fourteen larger vents for improved air flow.

Bell 4Forty Air MIPS Helmet

bell 4forty air mips bigger vents top view

The Bell 4Forty Air MIPS is a lightweight open-face mountain bike helmet aimed squarely at trail riders. Like the 4Forty that came before it, the new Air MIPS edition maintains the three-position peak, with the larger ventilation ports underneath able to accommodate sunglasses. In addition to improved air flow, the helmet also boasts improved compatibility with goggles, now with a more pronounced ridge at the rear which should serve to hold a goggle strap more securely.

bell 4forty air mips rear view retention system

The new Bell 4Forty Air looks to offer reasonable coverage down the occipital region of the head, with no obvious improvement over the previous 4Forty. There isn’t much exposed EPS to be seen on this helmet with the fusion in-mold polycarbonate shell wrapping around the lower parts of the shell keeping it looking trim.

bell 4forty air mips sunglasses port

Another premium feature of note is the Fidlock buckle, a magnetic buckle that can be easily closed and opened with one hand. That finishes off Bell’s Float Fit system with adjustable cam dividers helping to tailor the fit of the chin strap around the ears. The retention system’s width and vertical position can be adjusted for a secure fit. A proprietary Sweat Guide system is said to help direct sweat beading around the forehead region out to the sides, away from the rider’s eyes. 

Pricing & Availability

The new Bell 4Forty Air MIPS helmet is available now in sizes S-XL, covering head circumferences of 52cm to 65cm. This one retails at £139.99 and is available in a multitude of colorways, the exact availability of which differs by region. Contact your local Bell Helmets dealer to find out more.

bell 4forty air mips colors


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2 years ago

I have the older model and its a good helmet aside from the sweat guide system which in my experience guides sweat right down the center of your face.

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