Special tires?

[Doc Sprocket]

With your frontend, they probably DO turn a little unevenly. This does not constitute the Ackermann principle. Here's what you need to do to verify. Set your steering straight ahead. Draw a line from the middle of the kingpin bolt on one side, all the way to the middle of the rear axle. The kingpin bolt is what your steering knuckles pivot on. When you steer, your spindles are turning on this bolt. Got it? Cool. Now- extend that line further ahead on the same angle it's already on. Does it intersect with the middle of your tie rod end? If it does, your steering geometry employs the Ackermann principle. This test is easier with a long straightedge or some string, and no engine or seat in the way. The quick and dirty check (although less accurate) is just a visual indicator, as follows: Are your steering arms parallel with the wheel? They should not be. The steering arm I refer to is the piece of flat bar (usually), that is welded to your steering knuckle, and sticks forward (in your case). There is a hole drilled in the end of it, and your tie rod end is bolted to it.