95Power

Alright so I am wanting these Black C6 Replica Wheels from OE Wheel Distributors.
The fronts are 18x9.5 with an offset of 58.
The rears are 19x10 with an offset of 68.
With that being said what exactly am I going to have to do to make them fit properly without rubbing? Along with that I would like to know some tire sizes that would run well with them. I am not sure how the rears will fit, but I'd like them to just stick out a little or be even with the body, not sunk in.
Anyone with information please advise me. I want to get this all figured out so I can get them on for the spring.

Injuneer

I'd say the fronts will be OK. I run a 17X9.5 56mm offset and the inner edge of the wheel/tire is close to the steering knuckle. Adding 0.08" to the backspace should not be a problem. Particularly with the18"wheel, since the knuckle curves back away from the wheel as the diameter increases. A 275/35-18 or 285/35-18 tire will work.

In the back the 68mm offset puts the wheel too deep in the wheel well. That calculates to roughly an 8.14" backspace. Even with a 7.93" backspace I had to hammer the inner fenders, cut the edges off the jounce bumper brackets and recenter the chassis with an adjustable panhard rod. I think you will need at least a 7/8"adapter to move the outer edge of the tire closer to the outside edge of the fender. Tire would be a 285/30-19 or a 295/30-19.

95Power

Would it be easier just to run 18x9.5s all the way around because I have thought about that, just not totally sure what will look better.

Injuneer

If you want wider tires, you need wider wheels. The correct combination of width and offset puts them in the correct position in the wheel wells. The adapters will also solve the problems in the back. You have to decide if that's to much trouble.

Personally, I wouldn't go larger than 18" wheels. The sidewall gets so thin the rims and the tire are more susceptible to pothole damage, the ride gets uncomfortable, and the solid rear axle is not designed to provide the compliance a thin sidewall tire requires. And the rear discs look like toy brakes inside a 19" wheel. But that's just me.

95Power

So would the 7/8" adapters be the ones I would want for the wheels to line up with the fenders? I think now I have decided I will just save myself some trouble and go with the 18s all the way around.

Injuneer

You will need adapters for the 10" wide 68mm offset wheels. I'm giving you an estimate of the width you will need. The best way to get the correct width is to fit the wheels and measure the adapter width needed to put the wheels where you want them.

My numbers are accurate based on measurements of my car and a few other 4th Gens. But the assembly tolerances on these cars seem to vary all over the place. I posted what I had to do to get my 17X11.0" 50mm wheels to fit. Others indicate they did not have to do anything to fit identical wheels. Yet some huge slicks on Weld Pro-Stars that fit on my car with minimal problems required someone else to cut out the sheet metal rear fender liner and the jounce bumpers out.

Gregdonna

I run them on my 92 Z28 and had to space out the front 1"with spacer and the rear I used a 2"spacer. And now my front the wheels don't rub the struts and the rear took a 2" spacer gave the car a great stands.

Injuneer

The 3rd Gens and 4th Gens require totally different offsets, so you can;'t really compare the two.

Gregdonna

95Power

Went with the 18x9.5 all the way around and am throwing on 275/35/r18 on all 4 either the end of this week or next. Hopefully I don't run into any problems. I will post pictures as soon as they are on.

Injuneer

??????

bstieboydp

tolerances are def all over the place on my 96 bird, i put factory z06 19's on the rear w. 275 45's with a 1.25 no rubbing anywhere. and the stance is mean, 18's in the front like many others no problem

Injuneer

A 275/45-19 tire is a 28.8" tire intended for an SUV - 3" larger than the stock 4th Gen tires..

I'm surprised they even fit in the wheel wells.

bstieboydp

*typo 275/35/19