I think fitting them to your Passat is a dumb-f*ck idea.
£10 says they must weigh 10-15kg, so they'll junk the any handling that might still be lying about. You'll split the sidewalls on the cr@p tyres on any corrugation you find in the road and the limp-wristed 115bhp lump in the front will have trouble rotating them in the first place, as they look like they'll have a higher rolling radius than the current wheels.
Have you bought them yet then?