Wheel fit question

[Chuck Pierce]

I am looking for a set of snow tires and wheels.
I will be living in Truckee, Ca part time this winter.
I have UFO's and I realize there is a fit question.
I take the fit problem is where the wheel sets on the hub/brake disc.
I have been seeing a lot of A4, A6 wheels for sale with ET35.
If I am correct will I need a spacer on the front hubs, if so what size.

Thanks
Chuck

91 200tq Avant