How to make a wheel roll along a curve?

Hi folks, I took a look at Philippe Roubal’s .blend of the car rolling along a curve, but it didn’t open correctly in Blender 2.69.

All I want to know is one part of it anyway; It is easy enough to get wheel to turn with the curve, but how do you get it to dynamically roll without it looking like it is sliding?

I did read a bit somewhere about Stride - is that a way to do it? How about drivers? Transformation Constraint will not work because it goes by axes rather than distance along a curve.