Just got back down the firebreak up the back of my house. My new top speed on the Giant Reign 2 is 77.9km. And that was with my XC helmet on which I just discovered is cracked right through from when I came off on the BMX track a couple weeks back. I'm am in the que for the new Fox Flux helmet. I don't usually do downhill, mainly just agressive trails, try to do stuff on the BMX track and quite a bit of road due to some nagging injuries and sun going down to early after work now. Do you think a can get away with just this helmet or do you think I should get a full face like Bell Ballistic or Specialized Deviant. The Speci looks pretty breezy. Is anyone using it just for agressive XC?