What is ?

[Dafni]

Helium thinner than air? As in less density? Or less viscousity?
Both is the case with Helium, but the difference is neglectable, especially in our application.

As for faster response, I dunno. This sounds esoteric to me.
I like my tires with big vent holes, and "tune" the response with foams.

Nick, a gas not being balanced? In a spinning container?
I don't see this.

But anyway, Helium definitely has no real application in RC Monstertrucks. Unless someone comes up with a liquid Helium Cooling Circuit for BL motors :L: Stuff is hella cold!