[Serum]

Yeah, that's because it's thinner.. (in both ways..) i heard they run special gas, (i know the dutch name, don't know the scientific name for it..) in tires for powerbikes, the tire will run empty sooner than with air, but i thought they use it, because it hasn't got the large expanding air has got when it gets hotter..

(now THAT's one weird sentence...)

Closed tires on an RC vehicle makes the handling wors..