Scrub radius Vs Tire width

[pro-tour79]

Scrub radius is mentioned and talked about in Steve Smith's books and Herb Adams of the top of my head, the actual scrub radius is not affected by tire or track width but the wider the tire the more contact patch you have causing friction, this friction is a load force that the driver feels as resistance in the steering wheel AKA road feel, problem is that this force comes from the tire side of the steering system that means the faster the steering box ratio is the easier it is for this force to push back against the driver's input, too much scrub radius can cause the front end to shimy under hard braking, and I'll harp on this one more time , these forces are the reason you don't put a R&P designed for compact/modern cars in our older cars ans as mentioned above by B-alley "stuff can start to break"