I think that a find a bug...
When driving the "XR GT Turbo" at Blackwood i blow both front tires, so far so god (i now that is not a god thing but i was driving for fun).
But wen i enter a corner the tires deform as normal but wen i put full power to the brakes and the tires lock (still cornering ) the tires assume a position like they were normal (no deform)

This is a bug with the latest test patches, but not with the version you are using. Even if it was a bug with your version, it is pretty much 'unsupported' now, as version Y is on it's way...