i want this set of 18x8.5" 56mm offset and 19x10" 79mm offset c6 replicas for my 99 z28 i think 245/40/18s will be the same size as the stock tire for the front what is a 19" tire size that is the same or close to the same diameter as stock for the rear??
also will i need spacers? and how big for front or rear?

 

245/40/18 is fine

Based upon tire calculators 295/30/19 is what you need for the rear, although with a 76 MM offset i suspect you'll have issues with fitment

Based upon the FAQs it looks like the most offset you can achieve is 62 MM, basically I assume the backspacing is very minimal at that point and the wheel just won't fit

 

hmm well they mention needing spacers to fit the rears on fbodies but i never want to totally trust those ebay wheel companies just wondered if anyone knew for sure

 

Did you read the post "stickied" at the top of the Wheels and Tires forum listing, detailing what is required to put the C6 wheels on a 4th Gen. It gives you the thickness of the required spacer for the rear wheels. Or is that the source that you don't want to believe?

 

For the rear wheels a set of 1.25" hub spacers would give you the equivalent of a + 47.75mm offset for a +79mm offset wheel, and a +44.75mm offset with a +76mm offset wheel.

So get a 1.25" hub spacer/ wheel adapter.

 

yeah i suppose i could have read that huh??? wasn't even sure if the replicas were stock C6 offsets but i spose thats in there too. well thanks to the rest of ya for the help now all i need is to whip out the old plastic n go for it

G-force KDW 2's???

 

Sent you a pm.