Design & Ergonomics
The Nutcase Vio sports sober lines, like most helmets dedicated to the urban environment. The brand offers classic and all-purpose colors, but also more colorful versions, like the blue model that we tested. Anyway, the finishes are serious overall. This helmet is composed of two main parts designed by molding. Thus, the outer plastic shell is fused with a layer of expanded polystyrene. A second part uses the same process and fits into the first. As a result, the Nutcase Vio is a fairly thick and bulky headset. Its weight is affected with 451 g on the scale for the S/M model.
In terms of comfort, the inside of the helmet offers thin foam strips covered with breathable fabric. These bands are present on the frontal part and the top of the skull. Their thickness is sufficient to provide good comfort on even long journeys. The foam strips are held in place by scratches, so they can easily be removed for washing.
At the back of the Vio helmet, the occipital tightening is very easy with the help of a notched wheel. This effectively tightens the grip of the helmet on the skull for good support. Riders with long hair may be bothered by the lack of sufficient space above the occipital system to pass a ponytail through. The thin layer that lines the inside of the helmet, whose presence is due to the Mips technology, can tend to trap hair between it and the polystyrene layer.
The fastening of the chinstrap is carried out by a magnetic Fidlock mechanism, a very simple system to close and open, but which remains perfectly in place. The adjustment of the length of the strap is done on one side only. This has the effect of not perfectly centering the grip, which can be annoying, especially since Nutcase does not consider it necessary to provide a small foam protection to soften the contact of the strap and the buckle with the chin. .
On the top, three openings ventilate the skull of the cyclist. They are wide enough to provide a draft that will keep your head cool. The holes run the length of the Vio helmet, limiting their opening to the rain. Too bad that an insect net is not provided to avoid trapping small animals in the helmet.
A small visor provided by Nutcase can be attached to the front of the helmet. This reduces the effects of the sun and its rays on the cyclist’s vision.
The overweight of the American bicycle helmet comes partly from the fact that it embeds a fairly complete lighting system. A quartet of LEDs is placed at the front, under the brand logo. This front lighting device develops 200 lumens and is a good complement to the bicycle headlight. Above all, it allows you to be seen by placing yourself higher than the front light of a bicycle, which is of interest in an urban environment where you have to navigate in the middle of more or less high vehicles.
At the back and on the sides, a strip of LEDs runs through Nutcase’s helmet. They are displayed in red on the back and orange on the sides. It is possible to select a fixed, flashing or progressive intensity lighting. Once again, these LEDs are a very good way of signaling its presence to other road users. The headset is charged via a micro-USB port on the back. Vio announces 3 hours of autonomy for the LEDs, which we confirmed during our test.
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