I know most of the brand-name snobs here frown on cheaper helmets, but I've been a Nitro user for over two years and can't fault the N-510V, and that's what this is about. Yesterday I tried on a new 510V; it's now available in straight white, and looks very nice. I wear a size Large in my present helmet, so I though the Medium the shop had would be way too tight. But no, it fits exactly the same as my current Large helmet, and a Large in white, I'm confident would have been too 'sloppy'. So it seems that they have kept the model designation, but changed the size parameters :? I'm not saying that they shouldn't have, but if, for example, I'd have ordered a new Large 510V over the 'Net from them, or anyone else, based on my current lid, I would have ended up with a helmet that was a size too big :roll:.