The Arai XD4 is a modest update of the XD3. It includes a new face shield design that now incorporates brow vents. A redesigned peak and refined overall shape makes the XD4 the smoothest-feeling, ...

February 20, 2012 – Arai formally introduced the XD4 helmet at the 2012 Dealer Expo in Indianapolis, Indiana. I stopped by the Arai booth to ask about their internal shape “evolution” for the Signet-Q ...

We may receive a commission on purchases made from links. Those who have been considering getting one of the company's helmets may first want to know a bit more about which of these models has the ...