I don't know how the softer tire can free the rear end. I would rather say that this would be the feeling of the rear end swinging.
In experience rather the change of tire compound helps sometimes ( same firmness but different tire composition) Ex . I use bsr tires . Last race we experienced that pink tires ( 30sh long life) that in most conditions provide a lot of grip were a complete mistake , the right choice was bsr WHITE ( 30sh carpet compound) but on most tracks white feels like freeing the rear end more.
But i never come across the situation that softer tire of the same compound family was freeing the rear end.
Last edited by blazeblazucki; 12-18-2008 at 10:47 AM.