How does the kid steer? Bikes need the front wheel to be pretty close to perpendicular with the ground. Tilted over, you'd just go in a tight circle forever, and trying to turn would lift you off the training wheel.

You can still steer, since it is supported by the training wheel then the front wheel can be turned any direction as it isn't needed to be pointing a specific way to maintain balance.

Also I'm talking about the training wheels being lifted an inch or two. Causes a lean of maybe 10 - 15 degrees I'd guess.

Well there's your problem, you're supposed to lift up the training wheels over time. At the beginning they may be used all the time but by the end they should only be there to catch a bike that's falling over.

If the kid would alternate which training wheel is touching, then that would work. But once a side is picked they seem to center their balance between the back wheel and the one training wheel. I started off just barely raising it, and every couple weeks would adjust it another quarter inch or less. eventually they picked a side to lean and stayed with it.

That is where I was hoping to find spring loaded training wheels so that it forces the kid to constantly try to balance. Start off with really stiff springs and then weaken them over time.

Wow you should patent that. Or do a kickstarter. That sounds pretty useful.