245x45-17 tires

[Jinx]

Jinx here again.
I first off want to say a Thank You for all your responses to my
Question.
I have joined PCA and have -- will sign up for a Car Control Clinic.
A question on my original question. I may do a auto cross and
A D E event just for the fun of it. HA I am nervous just talking
About this. But that is my next question.

As you can tell I hate to scrap the tires from the Audi. Cheap I
Guess. Can I use the 245's just on the backs and keep the front
Size stock. I am afraid of the oversteer.
Or should I just scrap the 245's
I am not one to sell things on E-bay ect.

Thanks again for all your help
Jinx