Amongst other things, scrub radius is desirable to help pull a vehicle into a turn & is used in production & racing to different degrees for different applications. Thats just not desirable when trying to go fast on the salt surface. Going fast on the salt is not as easy as one might think, over the years I've helped a lot of people get their stuff to go straight.
The amount of times I've heard "how hard can it be to go in a straight line!"
Check out some in car vids at the salt & watch the horizon & you'll be surprised how many cars are not actually going straight. I pointed this out to another liner guy who said he didn't even notice it in the car & not long after that he crashed it.
Just here to help, not to criticize.
Sid.