cal 1

I was given 4 OZ rims with all season tires. The tire size is 235 55 R17. Will this work on my 2007 Avant with a 3.2 engine?

Dolamite

The concern shouldn't be with your engine, they be fine in that respect. Once you mount them they'll be noticeably fatter profile wise. There shouldn't be any clearance or rubbing issues with your spindle in think.

Maybe someone with more tire/wheel experience can chime in.

cal 1

Thanks for your response- you were right, the tires have enough clearance to function. The company that mounted them to see if they would fit, said that I can get 245 size tires for the same rims and that the 255 size would cause more stress on the steering mechanisms and wheel bearings. Audi does not recommend this size for a reason, maybe the extra stress on the front end is the concern.
Cal 1