Okay, don't yell too much but I have an idea. There are 2 companies I have found that sale bearings that are 1mm inDia X 3mm ODia X 1mm width.. Now I know that at this scale a bearing really wouldn't roll that well. I think though you could eliminate all axle noise and wobble and vibration.. so you would gain some performance... which would be offset by the weight and drag of the bearings... but now you would have an extremely silent ZipZap
One more crazy thought....with a bearing system you could remove the bar axle thus having a back end that is more like a real cars with a powered wheel and a wheel that's just along for the ride.
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