i've read so many of yalls helpful threads on tire and wheel fitment but havent found one that quite covers exactly what i'm looking for. and as i've already done once. i dont want to buy some rims and then end up not liking the fitment or the way they look. and i know some of you guys are really smart when it comes to this math stuff for wheels

i have a stock 77 corvette. the suspension is stock and i will adjust it upon wheel fitment.

the wheels i WANT to put on this are:

rear: 18x10 wheels with a 1 inch spacer and a +22mm offset

fronts: 18x9 wheels with a 1 inch spacer and a +24mm offset

what i'm really concerned about is the 9 inch wide wheels on the front? will it rub or interfere with my steering or suspension parts?


would really appreciate any help yall could offer before i make another costly mistake

 

OK we'll do a little math.
18x10 with 22mm + offset and 1" spacer. 0 offset on a 10" wheel would be a 5.5" backspace + 22mm or 7/8" would make the backspace 4 5/8" + your 1" "adapter" and your back to 5 5/8". Most guys who run a 18x10 go with a 5.5" backspace so you're in the ball park. Keep in mind you may have rear spring and sway bar interference issues.
18x9 with 24mm + offset and 1" spacer. 0 offset on a 9" wheel would be 5" + 24mm or 1" would make the backspace 4" and your 1" adapter and you are back to 5" backspace. That may be too much. You could run into the tire rubbing the frame. On top of that the ride height as the car sits now is probably too high to make a 18" wheel combo look good. More than likely you will need to lower the car to get the look you're after. That will compond any tire rubbing issues. 9" front wheel can be fitted (as others on the forum have done it) but it will take some adjustments to do it. You also have to keep in mind the General trimmed the front fenders on the '78 and up cars to get the 255/60-15s on a 8" wheel with 4" backspace to fit in the front without rubbing. Did I answer your question? Not really. If you want to "bolt on" and go I think you should pass. If you want to play with adapters, tire sizes, and possible body and suspension mods then go ahead.

 

That did the trick. Thanks for the help

 

double check your logic in your math 3JsVette, i think you're confusing positive and neg offests. also adapters reduce backspace not increase it. i'd go into it more right now but i'm posting from my phone

 

I have 17x9 in the front and went with 1" spacers and the tire rubbed the bottom lip of the fender. Changed to 1/2 in spacer and no problem.

 

I read that as an additional 22mm and 24mm of NEGATIVE offset and the spacer was canceling the offset. Based on the O/Ps response I thought that's what he meant.
So the backspace on the rears is 4 5/8" and the front is 4". Thankfully they still don't work

Thanks for the heads up.
Sorry for the confusion! :o