That said, at our level, all that matters to us is our small health, our desire to live in good condition, full, surrounded by the love of our loved ones and especially a good beer. And that’s good, for once; the collective interest meets the individual interest: wearing a helmet can also protect us. From there, you cannot refuse to wear a helmet. In the same logic, if we agree to wear a shell on the skull for our own good, nothing can justify the refusal of maximum protection.
The different closure systems
The two straps that attach the helmet are called jugular, the whole forming the jugular which must always be closed (and not too loose, you just have to slide two fingers underneath without being strangled).
Two systems clash: the mechanical closures, where it is a question of inserting a pin in a small box, a click coming to certify the good closing; and the classic “double-D” buckle, a little more tedious to install, but which has the advantage of always keeping an optimal tightening.
- It’s the only system allowed in competition, which some people think is “better”. This is in my opinion no longer the case for a long time.
- There are also closures called “rack”, with notches. Rather used on entry level headphones, but it has a practical side.
The composition of a helmet
The motorcycle helmets are composed of an outer shell and an inner quill. The shell can be made of synthetic or composite material. Its main function is to avoid the penetration of a blunt object inside the helmet and be the first shock absorber.
To make a polycarbonate helmet, plastic is injected into a mold. As a rule, helmets made with this technique are satisfied with only one size of cap.
Helmets made of composite material
Various fibers are used according to the manufacturers (fiberglass, carbon, Kevlar …), each having its advantages. Fiberglass is strong, but heavy, when the carbon is very light but can be weakened in case of extreme impact. Kevlar, by its reduced weight and good resistance to elongation (but not to compression) can be mixed with other fibers.
The weight of a helmet varies in proportions ranging from less than a kilo (helmet type “racing” carbon or minimalist jet) to 1,800 grams (adjustable), the average being around 1,300 – 1,400 grams for a complete.
On a long highway, a heavy helmet can become painful for the cervical if it is poorly balanced, but paradoxically a very light helmet is not necessarily the guarantee of increased comfort. He was able to ignore the sound insulation elements and the quality of foams to gain weight.