Is the weight of a helmet significant in trials? A lot of helmet descriptions on the supplier websites seem to make a big thing of it, but I can't see it being the most crucial factor. Fair enough if you race a car and the g-force is trying to rip your head off, but not on a bike going at a walking pace, surely.   As an example the Hebo Zone 4 weights 900g, and plenty of others weigh about 950g. But the Hebo 5 with built-in visor weighs 1200g. Trouble is, I quite like the idea of a built-in vi