Dear members,

I am looking some advice on tyres for an Audi A6 2006 Avant. I have recently purchased a set of alloys 19 inch RS4 alloys 8J x 19inch. The seller suggested buying a set of 235 x 35 x 19 for the alloys? I have checked a few A6 Le mans for sale and see they use a similar size of alloy and tyre. Will they fit straight onto the Audi A6 2006 or would I need to add something? Also would 215 35 19 tyres fit the same alloys. I am a bit inexperienced in this and not sure if the tyres will rub etc or prove to be a hazard.

On another note, I tow a caravan (not long distances as in storage with most sites 5-10 miles away). Should I change the tyres back to the standard 225 x 50 x 17 alloys which came with the car. Any help, websites, or recommendations welcome and please forgive as I`ve never upgraded alloys and just want to take advice on the matter.