looking at zr1 19x10 wheels
1. will i need a spacer, if so how big?
2. how much can i lower the car without it rubbing and whatnot?
3. i cannot find any drag radials for this size

EDIT: http://www.jegs.com/i/OE-Wheels/494/...rentProductId= the wheels say theyre hub centric and do not need any adapter or anything, can i use these on my car?