On a 99 C4 6 speed narrow body 996, will the following wheel size fit?
Fronts : 18 X 8 with 50mm offsets.
Rears : 18 X 11 with 63mm offsets.

I do not want to roll the fenders.

 

Check the offsets on your stock wheels...(they are printed next to valve stem if I remember)
I think these would fit as this is the size of the factory sport technos (and offesets)

 

yes they will fit.

 

Thanks for the response. Are there any issues I need to be aware of in this sort of application? - ie different alignment issues, rubbing, I have RoW M030 suspension too. Thanks again.

 

what tire are u going to use? u don't need a aggressive alignment. however, since the rear size/offset is the same as the current GT3 i'd suggest to roll the fenders (GT3 came rolled from factory) although u mentioned u didn't want to.

 

You shouldn't need to roll the fenders. Since the wheel is only coming out about 1/2" more than stock it will not rub. It's like adding a 12.7 mm spacer, and plently of people have put on 15 mm spacers...

 

What tires sizes do you suggest? - I was thinking 225 in front and 285 in rear. What do you think? - Also, do you have setting for the alignment that you suggest? - I could find out if a shop here in Michigan can copy that for me. Thanks

 

So there would not be an issue with the wheels also coming in toward the center of the car 12.5 mm as well?