OK thanks, I will take a look,
I really want to keep my Tyres (they cost enougth) or something similar so I may have to come to a compromise.
As you said the profile is to do with handling as they have little flex in the side walls, but when launching hard, I think you need the flex, else all the power will go stright to the road, and cos they are not slicks, they will spin. Thats what I have been told. I maybe wrong.
I will now check the links...