if your at stock height you will never hit the fenders regardless. when I was 24" FTG I used to rub the fender on the outer part of the tire leaving a harmless ring around the tire.
since running 225 tires I assume your on a 8" wide wheel?
that being said at 45ET you would need 17mm spacers on the front and 25mm on the back to be "flush".
typically an ET of 28 on the front and 20 on the back is "flush" without rub... given severity of drop. Again, you could go wider at stock height. Theres a kid on my street with bbs's that have half the meat of the tire past the fender. Looks like a monster truck type thing but hes never hit rubber.
Here's a dude on the vortex with almost that offset.
http://forums.vwvortex.com/showthre...ture-Index&p=77779218&viewfull=1#post77779218
Check out that thread in general if you want to see how other wheels and offsets fit. Also remember the stretch of the tire is a big factor in the "look" and not all tires stretch. The best tires do not stretch. Ex: Michelin PSS, Conti ExtremeContact DW etc. Cheap ones like Falken, Nexen etc do.
Edit: And find out the hub bore of the wheel. You want hubcentric adaptors, and hub centering rings if you cant get an adaptor with the same hub as the wheel too. In general you will find those wheels very hard to fit without going with large spacers (adaptors) since you are inside about 10mm more than normal. And go with a good brand such as H&R. Don't buy ebay junk unless you want your wheels to fall off.
