V70A's only have about 5mm when new. And thats only in the 2 centre grooves. The rest of the tread is even more shallow, about 3mm.
I was going to get a set for my own car, since they are street legal, but changed to the KU36's when they came into the country. A little more friendly for day to day use.
I think you might be thinking of the KU31's.