Try letting the car roll down a straight board. watch to see which direction it pulls. Pull each wheel out one by one and rotate the axle 90degrees. Youll see that the car will start to pull less with rotating the axles in the right direction. This is the most hated part of building for me but trust me, its worth it. If you have on front wheel raised, then its easier to get the car to steer straight. If you start to find that little sweet spot location for the axle rotation, then your car should roll straight. If the track that you run on has a center rail strip down the track, then let the touching front wheel lightly steer towards the center rail. Very lightly. If your car steers toward the center rail after about 6 - 8 ft then thats usually the right set up. Theory is that you want the car to get down the ramp as fast as possible then ride the center rail lightly on the flat. Good luck

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